diff --git a/MARS_Packages/REL02_POST/MARS-1409/01_MARS_1409_add_workflow_history_key_column.sql b/MARS_Packages/REL02_POST/MARS-1409/01_MARS_1409_add_workflow_history_key_column.sql
index db00601..96092d6 100644
--- a/MARS_Packages/REL02_POST/MARS-1409/01_MARS_1409_add_workflow_history_key_column.sql
+++ b/MARS_Packages/REL02_POST/MARS-1409/01_MARS_1409_add_workflow_history_key_column.sql
@@ -1,45 +1,39 @@
 -- ============================================================================
--- MARS-1409 Step 01: Add A_WORKFLOW_HISTORY_KEY column
+-- MARS-1409 Step 01: Add A_WORKFLOW_HISTORY_KEY column to A_SOURCE_FILE_RECEIVED
 -- ============================================================================
--- Purpose: Add A_WORKFLOW_HISTORY_KEY column to A_SOURCE_FILE_RECEIVED table
--- Prerequisites: Table A_SOURCE_FILE_RECEIVED exists, A_WORKFLOW_HISTORY table exists
+-- Purpose: Add A_WORKFLOW_HISTORY_KEY column to A_SOURCE_FILE_RECEIVED
+--          using ALTER TABLE to preserve existing data.
+-- Prerequisites: A_SOURCE_FILE_CONFIG table exists (FK dependency)
 -- ============================================================================
 
 SET SERVEROUTPUT ON SIZE UNLIMITED
 WHENEVER SQLERROR EXIT SQL.SQLCODE
 
 PROMPT
-PROMPT Adding A_WORKFLOW_HISTORY_KEY column to A_SOURCE_FILE_RECEIVED...
+PROMPT Adding A_WORKFLOW_HISTORY_KEY to A_SOURCE_FILE_RECEIVED...
 
-DECLARE
-    vColumnExists NUMBER := 0;
 BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_SOURCE_FILE_RECEIVED'
-      AND COLUMN_NAME = 'A_WORKFLOW_HISTORY_KEY';
-
-    IF vColumnExists > 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column A_WORKFLOW_HISTORY_KEY already exists.');
-        RETURN;
-    END IF;
-
-    EXECUTE IMMEDIATE '
-        ALTER TABLE CT_MRDS.A_SOURCE_FILE_RECEIVED ADD (
-            A_WORKFLOW_HISTORY_KEY NUMBER
-        )';
-
-    EXECUTE IMMEDIATE '
-        COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_RECEIVED.A_WORKFLOW_HISTORY_KEY IS
-            ''Direct link to workflow history - each file has exactly one workflow execution. Populated during VALIDATE_SOURCE_FILE_RECEIVED (MARS-1409)''';
-
-    DBMS_OUTPUT.PUT_LINE('A_WORKFLOW_HISTORY_KEY column added successfully!');
+    EXECUTE IMMEDIATE 'ALTER TABLE CT_MRDS.A_SOURCE_FILE_RECEIVED ADD (A_WORKFLOW_HISTORY_KEY NUMBER)';
+    DBMS_OUTPUT.PUT_LINE('Column A_WORKFLOW_HISTORY_KEY added to A_SOURCE_FILE_RECEIVED.');
 EXCEPTION
     WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR adding column: ' || SQLERRM);
-        RAISE;
+        IF SQLCODE = -1430 THEN
+            DBMS_OUTPUT.PUT_LINE('SKIP: Column A_WORKFLOW_HISTORY_KEY already exists in A_SOURCE_FILE_RECEIVED.');
+        ELSE
+            RAISE;
+        END IF;
 END;
 /
 
 PROMPT
+PROMPT Adding comment on A_WORKFLOW_HISTORY_KEY...
+
+BEGIN
+    EXECUTE IMMEDIATE q'[COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_RECEIVED.A_WORKFLOW_HISTORY_KEY IS 'Direct link to workflow history - each file has exactly one workflow execution. Populated during VALIDATE_SOURCE_FILE_RECEIVED (MARS-1409)']';
+    DBMS_OUTPUT.PUT_LINE('Comment on A_WORKFLOW_HISTORY_KEY added.');
+END;
+/
+
+PROMPT
+PROMPT Step 01 completed: A_WORKFLOW_HISTORY_KEY column added to A_SOURCE_FILE_RECEIVED.
+PROMPT
diff --git a/MARS_Packages/REL02_POST/MARS-1409/02_MARS_1409_add_archival_strategy_column.sql b/MARS_Packages/REL02_POST/MARS-1409/02_MARS_1409_add_archival_strategy_column.sql
index f4511d1..21009c3 100644
--- a/MARS_Packages/REL02_POST/MARS-1409/02_MARS_1409_add_archival_strategy_column.sql
+++ b/MARS_Packages/REL02_POST/MARS-1409/02_MARS_1409_add_archival_strategy_column.sql
@@ -1,348 +1,104 @@
 -- ============================================================================
--- MARS-1409 Step 10: Add ARCHIVAL_STRATEGY and ARCH_MINIMUM_AGE_MONTHS columns
---                    to A_TABLE_STAT and A_TABLE_STAT_HIST tables;
---                    add IS_WORKFLOW_SUCCESS_REQUIRED to A_SOURCE_FILE_CONFIG
+-- MARS-1409 Step 10: Update A_TABLE_STAT, A_TABLE_STAT_HIST, A_SOURCE_FILE_CONFIG
 -- ============================================================================
--- Purpose: Make statistics records fully self-documenting:
---   ARCHIVAL_STRATEGY       - strategy in effect when stats were gathered
---                             (THRESHOLD_BASED, MINIMUM_AGE_MONTHS, HYBRID)
---   ARCH_MINIMUM_AGE_MONTHS - minimum age threshold in months; complements
---                             ARCH_THRESHOLD_DAYS:
---                               THRESHOLD_BASED    -> ARCH_THRESHOLD_DAYS set, ARCH_MINIMUM_AGE_MONTHS NULL
---                               MINIMUM_AGE_MONTHS -> ARCH_THRESHOLD_DAYS NULL, ARCH_MINIMUM_AGE_MONTHS set
---                               HYBRID             -> both columns set
--- Prerequisites: A_TABLE_STAT and A_TABLE_STAT_HIST tables exist
+-- Purpose: Apply MARS-1409 table changes:
+--          - A_TABLE_STAT and A_TABLE_STAT_HIST: DROP and recreate from new_version
+--            (stats tables with no critical persistent data)
+--          - A_SOURCE_FILE_CONFIG: ALTER TABLE ADD IS_WORKFLOW_SUCCESS_REQUIRED column
+--            (preserves existing configuration data)
+--          - A_SOURCE_FILE_RECEIVED: no changes in this step
+-- Prerequisites: A_SOURCE table exists (FK parent of A_SOURCE_FILE_CONFIG)
 -- ============================================================================
 
 SET SERVEROUTPUT ON SIZE UNLIMITED
 WHENEVER SQLERROR EXIT SQL.SQLCODE
 
 -- ----------------------------------------------------------------------------
--- ARCHIVAL_STRATEGY
+-- DROP A_TABLE_STAT
 -- ----------------------------------------------------------------------------
 
 PROMPT
-PROMPT Adding ARCHIVAL_STRATEGY column to A_TABLE_STAT...
+PROMPT Dropping A_TABLE_STAT...
 
-DECLARE
-    vColumnExists NUMBER := 0;
 BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT'
-      AND COLUMN_NAME = 'ARCHIVAL_STRATEGY';
-
-    IF vColumnExists > 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column ARCHIVAL_STRATEGY already exists in A_TABLE_STAT.');
-    ELSE
-        EXECUTE IMMEDIATE '
-            ALTER TABLE CT_MRDS.A_TABLE_STAT ADD (
-                ARCHIVAL_STRATEGY VARCHAR2(30)
-            )';
-        EXECUTE IMMEDIATE '
-            COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.ARCHIVAL_STRATEGY IS
-                ''Archival strategy used when statistics were gathered (THRESHOLD_BASED, MINIMUM_AGE_MONTHS, HYBRID). Populated by FILE_ARCHIVER.GATHER_TABLE_STAT (MARS-1409)''';
-        DBMS_OUTPUT.PUT_LINE('Column ARCHIVAL_STRATEGY added to A_TABLE_STAT successfully.');
-    END IF;
+    EXECUTE IMMEDIATE 'DROP TABLE CT_MRDS.A_TABLE_STAT';
+    DBMS_OUTPUT.PUT_LINE('Table A_TABLE_STAT dropped.');
 EXCEPTION
     WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR adding ARCHIVAL_STRATEGY to A_TABLE_STAT: ' || SQLERRM);
-        RAISE;
-END;
-/
-
-PROMPT
-PROMPT Adding ARCHIVAL_STRATEGY column to A_TABLE_STAT_HIST...
-
-DECLARE
-    vColumnExists NUMBER := 0;
-BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT_HIST'
-      AND COLUMN_NAME = 'ARCHIVAL_STRATEGY';
-
-    IF vColumnExists > 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column ARCHIVAL_STRATEGY already exists in A_TABLE_STAT_HIST.');
-    ELSE
-        EXECUTE IMMEDIATE '
-            ALTER TABLE CT_MRDS.A_TABLE_STAT_HIST ADD (
-                ARCHIVAL_STRATEGY VARCHAR2(30)
-            )';
-        EXECUTE IMMEDIATE '
-            COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.ARCHIVAL_STRATEGY IS
-                ''Archival strategy used when statistics were gathered (THRESHOLD_BASED, MINIMUM_AGE_MONTHS, HYBRID). Populated by FILE_ARCHIVER.GATHER_TABLE_STAT (MARS-1409)''';
-        DBMS_OUTPUT.PUT_LINE('Column ARCHIVAL_STRATEGY added to A_TABLE_STAT_HIST successfully.');
-    END IF;
-EXCEPTION
-    WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR adding ARCHIVAL_STRATEGY to A_TABLE_STAT_HIST: ' || SQLERRM);
-        RAISE;
+        IF SQLCODE = -942 THEN
+            DBMS_OUTPUT.PUT_LINE('SKIP: Table A_TABLE_STAT does not exist.');
+        ELSE
+            RAISE;
+        END IF;
 END;
 /
 
 -- ----------------------------------------------------------------------------
--- ARCH_MINIMUM_AGE_MONTHS
+-- DROP A_TABLE_STAT_HIST
 -- ----------------------------------------------------------------------------
 
 PROMPT
-PROMPT Adding ARCH_MINIMUM_AGE_MONTHS column to A_TABLE_STAT...
+PROMPT Dropping A_TABLE_STAT_HIST...
 
-DECLARE
-    vColumnExists NUMBER := 0;
 BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT'
-      AND COLUMN_NAME = 'ARCH_MINIMUM_AGE_MONTHS';
-
-    IF vColumnExists > 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column ARCH_MINIMUM_AGE_MONTHS already exists in A_TABLE_STAT.');
-    ELSE
-        EXECUTE IMMEDIATE '
-            ALTER TABLE CT_MRDS.A_TABLE_STAT ADD (
-                ARCH_MINIMUM_AGE_MONTHS NUMBER(4,0)
-            )';
-        EXECUTE IMMEDIATE '
-            COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.ARCH_MINIMUM_AGE_MONTHS IS
-                ''Minimum age threshold in months used when statistics were gathered. Populated for MINIMUM_AGE_MONTHS and HYBRID strategies; NULL for THRESHOLD_BASED. Complements ARCH_THRESHOLD_DAYS. Populated by FILE_ARCHIVER.GATHER_TABLE_STAT (MARS-1409)''';
-        DBMS_OUTPUT.PUT_LINE('Column ARCH_MINIMUM_AGE_MONTHS added to A_TABLE_STAT successfully.');
-    END IF;
+    EXECUTE IMMEDIATE 'DROP TABLE CT_MRDS.A_TABLE_STAT_HIST';
+    DBMS_OUTPUT.PUT_LINE('Table A_TABLE_STAT_HIST dropped.');
 EXCEPTION
     WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR adding ARCH_MINIMUM_AGE_MONTHS to A_TABLE_STAT: ' || SQLERRM);
-        RAISE;
-END;
-/
-
-PROMPT
-PROMPT Adding ARCH_MINIMUM_AGE_MONTHS column to A_TABLE_STAT_HIST...
-
-DECLARE
-    vColumnExists NUMBER := 0;
-BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT_HIST'
-      AND COLUMN_NAME = 'ARCH_MINIMUM_AGE_MONTHS';
-
-    IF vColumnExists > 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column ARCH_MINIMUM_AGE_MONTHS already exists in A_TABLE_STAT_HIST.');
-    ELSE
-        EXECUTE IMMEDIATE '
-            ALTER TABLE CT_MRDS.A_TABLE_STAT_HIST ADD (
-                ARCH_MINIMUM_AGE_MONTHS NUMBER(4,0)
-            )';
-        EXECUTE IMMEDIATE '
-            COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.ARCH_MINIMUM_AGE_MONTHS IS
-                ''Minimum age threshold in months used when statistics were gathered. Populated for MINIMUM_AGE_MONTHS and HYBRID strategies; NULL for THRESHOLD_BASED. Complements ARCH_THRESHOLD_DAYS. Populated by FILE_ARCHIVER.GATHER_TABLE_STAT (MARS-1409)''';
-        DBMS_OUTPUT.PUT_LINE('Column ARCH_MINIMUM_AGE_MONTHS added to A_TABLE_STAT_HIST successfully.');
-    END IF;
-EXCEPTION
-    WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR adding ARCH_MINIMUM_AGE_MONTHS to A_TABLE_STAT_HIST: ' || SQLERRM);
-        RAISE;
+        IF SQLCODE = -942 THEN
+            DBMS_OUTPUT.PUT_LINE('SKIP: Table A_TABLE_STAT_HIST does not exist.');
+        ELSE
+            RAISE;
+        END IF;
 END;
 /
 
 -- ----------------------------------------------------------------------------
--- IS_WORKFLOW_SUCCESS_REQUIRED (A_TABLE_STAT, A_TABLE_STAT_HIST)
+-- ADD IS_WORKFLOW_SUCCESS_REQUIRED to A_SOURCE_FILE_CONFIG
 -- ----------------------------------------------------------------------------
 
 PROMPT
-PROMPT Adding IS_WORKFLOW_SUCCESS_REQUIRED column to A_TABLE_STAT...
+PROMPT Adding IS_WORKFLOW_SUCCESS_REQUIRED to A_SOURCE_FILE_CONFIG...
 
-DECLARE
-    vColumnExists NUMBER := 0;
 BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT'
-      AND COLUMN_NAME = 'IS_WORKFLOW_SUCCESS_REQUIRED';
-
-    IF vColumnExists > 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column IS_WORKFLOW_SUCCESS_REQUIRED already exists in A_TABLE_STAT.');
-    ELSE
-        EXECUTE IMMEDIATE '
-            ALTER TABLE CT_MRDS.A_TABLE_STAT ADD (
-                IS_WORKFLOW_SUCCESS_REQUIRED CHAR(1)
-            )';
-        EXECUTE IMMEDIATE '
-            COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.IS_WORKFLOW_SUCCESS_REQUIRED IS
-                ''Reflects IS_WORKFLOW_SUCCESS_REQUIRED value from A_SOURCE_FILE_CONFIG at time statistics were gathered. Y=counts include only WORKFLOW_SUCCESSFUL=Y rows, N=all rows regardless. Added MARS-1409''';
-        DBMS_OUTPUT.PUT_LINE('Column IS_WORKFLOW_SUCCESS_REQUIRED added to A_TABLE_STAT successfully.');
-    END IF;
+    EXECUTE IMMEDIATE
+        'ALTER TABLE CT_MRDS.A_SOURCE_FILE_CONFIG ADD ('
+        || '  IS_WORKFLOW_SUCCESS_REQUIRED CHAR(1) DEFAULT ''Y'' NOT NULL '
+        || '  CONSTRAINT CHK_IS_WORKFLOW_SUCCESS_REQUIRED CHECK (IS_WORKFLOW_SUCCESS_REQUIRED IN (''Y'', ''N''))'
+        || ')';
+    DBMS_OUTPUT.PUT_LINE('Column IS_WORKFLOW_SUCCESS_REQUIRED added to A_SOURCE_FILE_CONFIG.');
 EXCEPTION
     WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR adding IS_WORKFLOW_SUCCESS_REQUIRED to A_TABLE_STAT: ' || SQLERRM);
-        RAISE;
+        IF SQLCODE = -1430 THEN
+            DBMS_OUTPUT.PUT_LINE('SKIP: Column IS_WORKFLOW_SUCCESS_REQUIRED already exists in A_SOURCE_FILE_CONFIG.');
+        ELSE
+            RAISE;
+        END IF;
 END;
 /
 
 PROMPT
-PROMPT Adding IS_WORKFLOW_SUCCESS_REQUIRED column to A_TABLE_STAT_HIST...
+PROMPT Adding comment on IS_WORKFLOW_SUCCESS_REQUIRED...
 
-DECLARE
-    vColumnExists NUMBER := 0;
 BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT_HIST'
-      AND COLUMN_NAME = 'IS_WORKFLOW_SUCCESS_REQUIRED';
-
-    IF vColumnExists > 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column IS_WORKFLOW_SUCCESS_REQUIRED already exists in A_TABLE_STAT_HIST.');
-    ELSE
-        EXECUTE IMMEDIATE '
-            ALTER TABLE CT_MRDS.A_TABLE_STAT_HIST ADD (
-                IS_WORKFLOW_SUCCESS_REQUIRED CHAR(1)
-            )';
-        EXECUTE IMMEDIATE '
-            COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.IS_WORKFLOW_SUCCESS_REQUIRED IS
-                ''Reflects IS_WORKFLOW_SUCCESS_REQUIRED value from A_SOURCE_FILE_CONFIG at time statistics were gathered. Y=counts include only WORKFLOW_SUCCESSFUL=Y rows, N=all rows regardless. Added MARS-1409''';
-        DBMS_OUTPUT.PUT_LINE('Column IS_WORKFLOW_SUCCESS_REQUIRED added to A_TABLE_STAT_HIST successfully.');
-    END IF;
-EXCEPTION
-    WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR adding IS_WORKFLOW_SUCCESS_REQUIRED to A_TABLE_STAT_HIST: ' || SQLERRM);
-        RAISE;
+    EXECUTE IMMEDIATE q'[COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.IS_WORKFLOW_SUCCESS_REQUIRED IS 'Y=Archivization requires WORKFLOW_SUCCESSFUL=Y (standard DBT flow), N=Archive regardless of workflow completion status (bypass for manual/non-DBT sources). Added MARS-1409']';
+    DBMS_OUTPUT.PUT_LINE('Comment on IS_WORKFLOW_SUCCESS_REQUIRED added.');
 END;
 /
 
 -- ----------------------------------------------------------------------------
--- IS_WORKFLOW_SUCCESS_REQUIRED (A_SOURCE_FILE_CONFIG)
+-- RECREATE A_TABLE_STAT and A_TABLE_STAT_HIST from new_version
 -- ----------------------------------------------------------------------------
 
 PROMPT
-PROMPT Adding IS_WORKFLOW_SUCCESS_REQUIRED column to A_SOURCE_FILE_CONFIG...
-
-DECLARE
-    vColumnExists NUMBER := 0;
-BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_SOURCE_FILE_CONFIG'
-      AND COLUMN_NAME = 'IS_WORKFLOW_SUCCESS_REQUIRED';
-
-    IF vColumnExists > 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column IS_WORKFLOW_SUCCESS_REQUIRED already exists in A_SOURCE_FILE_CONFIG.');
-    ELSE
-        EXECUTE IMMEDIATE '
-            ALTER TABLE CT_MRDS.A_SOURCE_FILE_CONFIG ADD (
-                IS_WORKFLOW_SUCCESS_REQUIRED CHAR(1) DEFAULT ''Y'' NOT NULL
-            )';
-        EXECUTE IMMEDIATE '
-            ALTER TABLE CT_MRDS.A_SOURCE_FILE_CONFIG ADD CONSTRAINT
-                CHK_IS_WORKFLOW_SUCCESS_REQUIRED CHECK (IS_WORKFLOW_SUCCESS_REQUIRED IN (''Y'', ''N''))';
-        EXECUTE IMMEDIATE '
-            COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.IS_WORKFLOW_SUCCESS_REQUIRED IS
-                ''Y=Archivization requires WORKFLOW_SUCCESSFUL=Y (standard DBT flow), N=Archive regardless of workflow completion status (bypass for manual/non-DBT sources). Added MARS-1409''';
-        DBMS_OUTPUT.PUT_LINE('Column IS_WORKFLOW_SUCCESS_REQUIRED added to A_SOURCE_FILE_CONFIG successfully.');
-    END IF;
-EXCEPTION
-    WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR adding IS_WORKFLOW_SUCCESS_REQUIRED to A_SOURCE_FILE_CONFIG: ' || SQLERRM);
-        RAISE;
-END;
-/
-
--- ----------------------------------------------------------------------------
--- WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_SIZE
--- (A_TABLE_STAT)
--- ----------------------------------------------------------------------------
+PROMPT Creating A_TABLE_STAT (new_version)...
+@@new_version/A_TABLE_STAT.sql
 
 PROMPT
-PROMPT Adding WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_SIZE columns to A_TABLE_STAT...
-
-DECLARE
-    vColumnExists NUMBER := 0;
-BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT'
-      AND COLUMN_NAME = 'WORKFLOW_SUCCESS_FILE_COUNT';
-
-    IF vColumnExists > 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column WORKFLOW_SUCCESS_FILE_COUNT already exists in A_TABLE_STAT.');
-    ELSE
-        EXECUTE IMMEDIATE '
-            ALTER TABLE CT_MRDS.A_TABLE_STAT ADD (
-                WORKFLOW_SUCCESS_FILE_COUNT  NUMBER(38,0),
-                WORKFLOW_SUCCESS_ROW_COUNT   NUMBER(38,0),
-                WORKFLOW_SUCCESS_SIZE        NUMBER(38,0)
-            )';
-        EXECUTE IMMEDIATE '
-            COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.WORKFLOW_SUCCESS_FILE_COUNT IS
-                ''Count of files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409''';
-        EXECUTE IMMEDIATE '
-            COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.WORKFLOW_SUCCESS_ROW_COUNT IS
-                ''Row count for files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409''';
-        EXECUTE IMMEDIATE '
-            COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.WORKFLOW_SUCCESS_SIZE IS
-                ''Size in bytes for files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409''';
-        DBMS_OUTPUT.PUT_LINE('Columns WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_SIZE added to A_TABLE_STAT successfully.');
-    END IF;
-EXCEPTION
-    WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR adding WORKFLOW_SUCCESS_* columns to A_TABLE_STAT: ' || SQLERRM);
-        RAISE;
-END;
-/
-
--- ----------------------------------------------------------------------------
--- WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_SIZE
--- (A_TABLE_STAT_HIST)
--- ----------------------------------------------------------------------------
+PROMPT Creating A_TABLE_STAT_HIST (new_version)...
+@@new_version/A_TABLE_STAT_HIST.sql
 
 PROMPT
-PROMPT Adding WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_SIZE columns to A_TABLE_STAT_HIST...
-
-DECLARE
-    vColumnExists NUMBER := 0;
-BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT_HIST'
-      AND COLUMN_NAME = 'WORKFLOW_SUCCESS_FILE_COUNT';
-
-    IF vColumnExists > 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column WORKFLOW_SUCCESS_FILE_COUNT already exists in A_TABLE_STAT_HIST.');
-    ELSE
-        EXECUTE IMMEDIATE '
-            ALTER TABLE CT_MRDS.A_TABLE_STAT_HIST ADD (
-                WORKFLOW_SUCCESS_FILE_COUNT  NUMBER(38,0),
-                WORKFLOW_SUCCESS_ROW_COUNT   NUMBER(38,0),
-                WORKFLOW_SUCCESS_SIZE        NUMBER(38,0)
-            )';
-        EXECUTE IMMEDIATE '
-            COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.WORKFLOW_SUCCESS_FILE_COUNT IS
-                ''Count of files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409''';
-        EXECUTE IMMEDIATE '
-            COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.WORKFLOW_SUCCESS_ROW_COUNT IS
-                ''Row count for files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409''';
-        EXECUTE IMMEDIATE '
-            COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.WORKFLOW_SUCCESS_SIZE IS
-                ''Size in bytes for files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409''';
-        DBMS_OUTPUT.PUT_LINE('Columns WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_SIZE added to A_TABLE_STAT_HIST successfully.');
-    END IF;
-EXCEPTION
-    WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR adding WORKFLOW_SUCCESS_* columns to A_TABLE_STAT_HIST: ' || SQLERRM);
-        RAISE;
-END;
-/
-
-PROMPT
-PROMPT Step 10 completed: ARCHIVAL_STRATEGY and ARCH_MINIMUM_AGE_MONTHS columns added to both statistics tables.
-PROMPT IS_WORKFLOW_SUCCESS_REQUIRED added to A_SOURCE_FILE_CONFIG, A_TABLE_STAT and A_TABLE_STAT_HIST.
-PROMPT WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_SIZE added to A_TABLE_STAT and A_TABLE_STAT_HIST.
+PROMPT Step 10 completed: A_TABLE_STAT and A_TABLE_STAT_HIST recreated from new_version scripts,
+PROMPT IS_WORKFLOW_SUCCESS_REQUIRED column added to A_SOURCE_FILE_CONFIG (MARS-1409).
 PROMPT
diff --git a/MARS_Packages/REL02_POST/MARS-1409/98_MARS_1409_rollback_archival_strategy_column.sql b/MARS_Packages/REL02_POST/MARS-1409/98_MARS_1409_rollback_archival_strategy_column.sql
index f7f3487..7b003d9 100644
--- a/MARS_Packages/REL02_POST/MARS-1409/98_MARS_1409_rollback_archival_strategy_column.sql
+++ b/MARS_Packages/REL02_POST/MARS-1409/98_MARS_1409_rollback_archival_strategy_column.sql
@@ -1,9 +1,12 @@
 -- ============================================================================
--- MARS-1409 Rollback Step 100: Drop ARCHIVAL_STRATEGY and ARCH_MINIMUM_AGE_MONTHS
---                               columns from A_TABLE_STAT and A_TABLE_STAT_HIST;
---                               drop IS_WORKFLOW_SUCCESS_REQUIRED from A_SOURCE_FILE_CONFIG
+-- MARS-1409 Rollback Step 100: Restore A_TABLE_STAT, A_TABLE_STAT_HIST,
+--                               remove IS_WORKFLOW_SUCCESS_REQUIRED from A_SOURCE_FILE_CONFIG
 -- ============================================================================
--- Purpose: Rollback of step 10 - remove both stat self-documentation columns
+-- Purpose: Rollback of step 10:
+--          - A_TABLE_STAT and A_TABLE_STAT_HIST: DROP and recreate from rollback_version
+--          - A_SOURCE_FILE_CONFIG: ALTER TABLE DROP COLUMN IS_WORKFLOW_SUCCESS_REQUIRED
+--            (preserves existing configuration data)
+--          - A_SOURCE_FILE_RECEIVED: no changes in this step
 -- Prerequisites: Step 10 was applied
 -- ============================================================================
 
@@ -11,254 +14,79 @@ SET SERVEROUTPUT ON SIZE UNLIMITED
 WHENEVER SQLERROR EXIT SQL.SQLCODE
 
 -- ----------------------------------------------------------------------------
--- ARCH_MINIMUM_AGE_MONTHS (drop first - added second)
+-- DROP A_TABLE_STAT
 -- ----------------------------------------------------------------------------
 
 PROMPT
-PROMPT Dropping ARCH_MINIMUM_AGE_MONTHS column from A_TABLE_STAT...
+PROMPT Dropping A_TABLE_STAT...
 
-DECLARE
-    vColumnExists NUMBER := 0;
 BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT'
-      AND COLUMN_NAME = 'ARCH_MINIMUM_AGE_MONTHS';
-
-    IF vColumnExists = 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column ARCH_MINIMUM_AGE_MONTHS does not exist in A_TABLE_STAT.');
-    ELSE
-        EXECUTE IMMEDIATE 'ALTER TABLE CT_MRDS.A_TABLE_STAT DROP COLUMN ARCH_MINIMUM_AGE_MONTHS';
-        DBMS_OUTPUT.PUT_LINE('Column ARCH_MINIMUM_AGE_MONTHS dropped from A_TABLE_STAT successfully.');
-    END IF;
+    EXECUTE IMMEDIATE 'DROP TABLE CT_MRDS.A_TABLE_STAT';
+    DBMS_OUTPUT.PUT_LINE('Table A_TABLE_STAT dropped.');
 EXCEPTION
     WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR dropping ARCH_MINIMUM_AGE_MONTHS from A_TABLE_STAT: ' || SQLERRM);
-        RAISE;
-END;
-/
-
-PROMPT
-PROMPT Dropping ARCH_MINIMUM_AGE_MONTHS column from A_TABLE_STAT_HIST...
-
-DECLARE
-    vColumnExists NUMBER := 0;
-BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT_HIST'
-      AND COLUMN_NAME = 'ARCH_MINIMUM_AGE_MONTHS';
-
-    IF vColumnExists = 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column ARCH_MINIMUM_AGE_MONTHS does not exist in A_TABLE_STAT_HIST.');
-    ELSE
-        EXECUTE IMMEDIATE 'ALTER TABLE CT_MRDS.A_TABLE_STAT_HIST DROP COLUMN ARCH_MINIMUM_AGE_MONTHS';
-        DBMS_OUTPUT.PUT_LINE('Column ARCH_MINIMUM_AGE_MONTHS dropped from A_TABLE_STAT_HIST successfully.');
-    END IF;
-EXCEPTION
-    WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR dropping ARCH_MINIMUM_AGE_MONTHS from A_TABLE_STAT_HIST: ' || SQLERRM);
-        RAISE;
+        IF SQLCODE = -942 THEN
+            DBMS_OUTPUT.PUT_LINE('SKIP: Table A_TABLE_STAT does not exist.');
+        ELSE
+            RAISE;
+        END IF;
 END;
 /
 
 -- ----------------------------------------------------------------------------
--- ARCHIVAL_STRATEGY
+-- DROP A_TABLE_STAT_HIST
 -- ----------------------------------------------------------------------------
 
 PROMPT
-PROMPT Dropping ARCHIVAL_STRATEGY column from A_TABLE_STAT...
+PROMPT Dropping A_TABLE_STAT_HIST...
 
-DECLARE
-    vColumnExists NUMBER := 0;
 BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT'
-      AND COLUMN_NAME = 'ARCHIVAL_STRATEGY';
-
-    IF vColumnExists = 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column ARCHIVAL_STRATEGY does not exist in A_TABLE_STAT.');
-    ELSE
-        EXECUTE IMMEDIATE 'ALTER TABLE CT_MRDS.A_TABLE_STAT DROP COLUMN ARCHIVAL_STRATEGY';
-        DBMS_OUTPUT.PUT_LINE('Column ARCHIVAL_STRATEGY dropped from A_TABLE_STAT successfully.');
-    END IF;
+    EXECUTE IMMEDIATE 'DROP TABLE CT_MRDS.A_TABLE_STAT_HIST';
+    DBMS_OUTPUT.PUT_LINE('Table A_TABLE_STAT_HIST dropped.');
 EXCEPTION
     WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR dropping ARCHIVAL_STRATEGY from A_TABLE_STAT: ' || SQLERRM);
-        RAISE;
-END;
-/
-
-PROMPT
-PROMPT Dropping ARCHIVAL_STRATEGY column from A_TABLE_STAT_HIST...
-
-DECLARE
-    vColumnExists NUMBER := 0;
-BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT_HIST'
-      AND COLUMN_NAME = 'ARCHIVAL_STRATEGY';
-
-    IF vColumnExists = 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column ARCHIVAL_STRATEGY does not exist in A_TABLE_STAT_HIST.');
-    ELSE
-        EXECUTE IMMEDIATE 'ALTER TABLE CT_MRDS.A_TABLE_STAT_HIST DROP COLUMN ARCHIVAL_STRATEGY';
-        DBMS_OUTPUT.PUT_LINE('Column ARCHIVAL_STRATEGY dropped from A_TABLE_STAT_HIST successfully.');
-    END IF;
-EXCEPTION
-    WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR dropping ARCHIVAL_STRATEGY from A_TABLE_STAT_HIST: ' || SQLERRM);
-        RAISE;
+        IF SQLCODE = -942 THEN
+            DBMS_OUTPUT.PUT_LINE('SKIP: Table A_TABLE_STAT_HIST does not exist.');
+        ELSE
+            RAISE;
+        END IF;
 END;
 /
 
 -- ----------------------------------------------------------------------------
--- IS_WORKFLOW_SUCCESS_REQUIRED (A_TABLE_STAT, A_TABLE_STAT_HIST)
+-- DROP IS_WORKFLOW_SUCCESS_REQUIRED from A_SOURCE_FILE_CONFIG
 -- ----------------------------------------------------------------------------
 
 PROMPT
-PROMPT Dropping IS_WORKFLOW_SUCCESS_REQUIRED column from A_TABLE_STAT...
+PROMPT Dropping IS_WORKFLOW_SUCCESS_REQUIRED from A_SOURCE_FILE_CONFIG...
 
-DECLARE
-    vColumnExists NUMBER := 0;
 BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT'
-      AND COLUMN_NAME = 'IS_WORKFLOW_SUCCESS_REQUIRED';
-
-    IF vColumnExists = 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column IS_WORKFLOW_SUCCESS_REQUIRED does not exist in A_TABLE_STAT.');
-    ELSE
-        EXECUTE IMMEDIATE 'ALTER TABLE CT_MRDS.A_TABLE_STAT DROP COLUMN IS_WORKFLOW_SUCCESS_REQUIRED';
-        DBMS_OUTPUT.PUT_LINE('Column IS_WORKFLOW_SUCCESS_REQUIRED dropped from A_TABLE_STAT successfully.');
-    END IF;
+    EXECUTE IMMEDIATE 'ALTER TABLE CT_MRDS.A_SOURCE_FILE_CONFIG DROP COLUMN IS_WORKFLOW_SUCCESS_REQUIRED';
+    DBMS_OUTPUT.PUT_LINE('Column IS_WORKFLOW_SUCCESS_REQUIRED dropped from A_SOURCE_FILE_CONFIG (CHK_IS_WORKFLOW_SUCCESS_REQUIRED constraint dropped automatically).');
 EXCEPTION
     WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR dropping IS_WORKFLOW_SUCCESS_REQUIRED from A_TABLE_STAT: ' || SQLERRM);
-        RAISE;
-END;
-/
-
-PROMPT
-PROMPT Dropping IS_WORKFLOW_SUCCESS_REQUIRED column from A_TABLE_STAT_HIST...
-
-DECLARE
-    vColumnExists NUMBER := 0;
-BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT_HIST'
-      AND COLUMN_NAME = 'IS_WORKFLOW_SUCCESS_REQUIRED';
-
-    IF vColumnExists = 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column IS_WORKFLOW_SUCCESS_REQUIRED does not exist in A_TABLE_STAT_HIST.');
-    ELSE
-        EXECUTE IMMEDIATE 'ALTER TABLE CT_MRDS.A_TABLE_STAT_HIST DROP COLUMN IS_WORKFLOW_SUCCESS_REQUIRED';
-        DBMS_OUTPUT.PUT_LINE('Column IS_WORKFLOW_SUCCESS_REQUIRED dropped from A_TABLE_STAT_HIST successfully.');
-    END IF;
-EXCEPTION
-    WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR dropping IS_WORKFLOW_SUCCESS_REQUIRED from A_TABLE_STAT_HIST: ' || SQLERRM);
-        RAISE;
+        IF SQLCODE = -904 THEN
+            DBMS_OUTPUT.PUT_LINE('SKIP: Column IS_WORKFLOW_SUCCESS_REQUIRED does not exist in A_SOURCE_FILE_CONFIG.');
+        ELSE
+            RAISE;
+        END IF;
 END;
 /
 
 -- ----------------------------------------------------------------------------
--- IS_WORKFLOW_SUCCESS_REQUIRED (A_SOURCE_FILE_CONFIG)
+-- RECREATE A_TABLE_STAT and A_TABLE_STAT_HIST from rollback_version
 -- ----------------------------------------------------------------------------
 
 PROMPT
-PROMPT Dropping IS_WORKFLOW_SUCCESS_REQUIRED column from A_SOURCE_FILE_CONFIG...
-
-DECLARE
-    vColumnExists NUMBER := 0;
-BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_SOURCE_FILE_CONFIG'
-      AND COLUMN_NAME = 'IS_WORKFLOW_SUCCESS_REQUIRED';
-
-    IF vColumnExists = 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column IS_WORKFLOW_SUCCESS_REQUIRED does not exist in A_SOURCE_FILE_CONFIG.');
-    ELSE
-        EXECUTE IMMEDIATE 'ALTER TABLE CT_MRDS.A_SOURCE_FILE_CONFIG DROP CONSTRAINT CHK_IS_WORKFLOW_SUCCESS_REQUIRED';
-        EXECUTE IMMEDIATE 'ALTER TABLE CT_MRDS.A_SOURCE_FILE_CONFIG DROP COLUMN IS_WORKFLOW_SUCCESS_REQUIRED';
-        DBMS_OUTPUT.PUT_LINE('Column IS_WORKFLOW_SUCCESS_REQUIRED dropped from A_SOURCE_FILE_CONFIG successfully.');
-    END IF;
-EXCEPTION
-    WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR dropping IS_WORKFLOW_SUCCESS_REQUIRED from A_SOURCE_FILE_CONFIG: ' || SQLERRM);
-        RAISE;
-END;
-/
-
--- ----------------------------------------------------------------------------
--- WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_SIZE
--- (drop from A_TABLE_STAT and A_TABLE_STAT_HIST)
--- ----------------------------------------------------------------------------
+PROMPT Creating A_TABLE_STAT (rollback_version - pre-MARS-1409 structure)...
+@@rollback_version/A_TABLE_STAT.sql
 
 PROMPT
-PROMPT Dropping WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_SIZE from A_TABLE_STAT...
-
-DECLARE
-    vColumnExists NUMBER := 0;
-BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT'
-      AND COLUMN_NAME = 'WORKFLOW_SUCCESS_FILE_COUNT';
-
-    IF vColumnExists = 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column WORKFLOW_SUCCESS_FILE_COUNT does not exist in A_TABLE_STAT.');
-    ELSE
-        EXECUTE IMMEDIATE 'ALTER TABLE CT_MRDS.A_TABLE_STAT DROP (WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_SIZE)';
-        DBMS_OUTPUT.PUT_LINE('Columns WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_SIZE dropped from A_TABLE_STAT successfully.');
-    END IF;
-EXCEPTION
-    WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR dropping WORKFLOW_SUCCESS_* columns from A_TABLE_STAT: ' || SQLERRM);
-        RAISE;
-END;
-/
+PROMPT Creating A_TABLE_STAT_HIST (rollback_version - pre-MARS-1409 structure)...
+@@rollback_version/A_TABLE_STAT_HIST.sql
 
 PROMPT
-PROMPT Dropping WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_SIZE from A_TABLE_STAT_HIST...
-
-DECLARE
-    vColumnExists NUMBER := 0;
-BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_TABLE_STAT_HIST'
-      AND COLUMN_NAME = 'WORKFLOW_SUCCESS_FILE_COUNT';
-
-    IF vColumnExists = 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column WORKFLOW_SUCCESS_FILE_COUNT does not exist in A_TABLE_STAT_HIST.');
-    ELSE
-        EXECUTE IMMEDIATE 'ALTER TABLE CT_MRDS.A_TABLE_STAT_HIST DROP (WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_SIZE)';
-        DBMS_OUTPUT.PUT_LINE('Columns WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_SIZE dropped from A_TABLE_STAT_HIST successfully.');
-    END IF;
-EXCEPTION
-    WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR dropping WORKFLOW_SUCCESS_* columns from A_TABLE_STAT_HIST: ' || SQLERRM);
-        RAISE;
-END;
-/
-
-PROMPT
-PROMPT Rollback step 100 completed: ARCHIVAL_STRATEGY and ARCH_MINIMUM_AGE_MONTHS columns removed from both statistics tables.
-PROMPT IS_WORKFLOW_SUCCESS_REQUIRED removed from A_SOURCE_FILE_CONFIG, A_TABLE_STAT and A_TABLE_STAT_HIST.
-PROMPT WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_SIZE removed from A_TABLE_STAT and A_TABLE_STAT_HIST.
+PROMPT Rollback Step 100 completed: A_TABLE_STAT and A_TABLE_STAT_HIST restored to pre-MARS-1409
+PROMPT structure, IS_WORKFLOW_SUCCESS_REQUIRED column removed from A_SOURCE_FILE_CONFIG.
 PROMPT
+
diff --git a/MARS_Packages/REL02_POST/MARS-1409/99_MARS_1409_rollback_workflow_history_key_column.sql b/MARS_Packages/REL02_POST/MARS-1409/99_MARS_1409_rollback_workflow_history_key_column.sql
index e6ca4e3..fe169c0 100644
--- a/MARS_Packages/REL02_POST/MARS-1409/99_MARS_1409_rollback_workflow_history_key_column.sql
+++ b/MARS_Packages/REL02_POST/MARS-1409/99_MARS_1409_rollback_workflow_history_key_column.sql
@@ -1,44 +1,30 @@
 -- ============================================================================
--- MARS-1409 Rollback 91: Drop A_WORKFLOW_HISTORY_KEY column
+-- MARS-1409 Rollback 99: Remove A_WORKFLOW_HISTORY_KEY column from A_SOURCE_FILE_RECEIVED
 -- ============================================================================
--- Purpose: Remove A_WORKFLOW_HISTORY_KEY column from A_SOURCE_FILE_RECEIVED
+-- Purpose: Drop A_WORKFLOW_HISTORY_KEY column from A_SOURCE_FILE_RECEIVED
+--          using ALTER TABLE to preserve existing data.
+-- Prerequisites: A_SOURCE_FILE_CONFIG table exists (FK dependency)
 -- ============================================================================
 
 SET SERVEROUTPUT ON SIZE UNLIMITED
 WHENEVER SQLERROR EXIT SQL.SQLCODE
 
 PROMPT
-PROMPT Dropping A_WORKFLOW_HISTORY_KEY column from A_SOURCE_FILE_RECEIVED...
+PROMPT Dropping A_WORKFLOW_HISTORY_KEY from A_SOURCE_FILE_RECEIVED...
 
-DECLARE
-    vColumnExists NUMBER := 0;
 BEGIN
-    SELECT COUNT(*) INTO vColumnExists
-    FROM ALL_TAB_COLUMNS
-    WHERE OWNER = 'CT_MRDS'
-      AND TABLE_NAME = 'A_SOURCE_FILE_RECEIVED'
-      AND COLUMN_NAME = 'A_WORKFLOW_HISTORY_KEY';
-
-    IF vColumnExists = 0 THEN
-        DBMS_OUTPUT.PUT_LINE('SKIP: Column A_WORKFLOW_HISTORY_KEY does not exist (already dropped).');
-        RETURN;
-    END IF;
-
     EXECUTE IMMEDIATE 'ALTER TABLE CT_MRDS.A_SOURCE_FILE_RECEIVED DROP COLUMN A_WORKFLOW_HISTORY_KEY';
-    DBMS_OUTPUT.PUT_LINE('A_WORKFLOW_HISTORY_KEY column dropped successfully!');
-
-    -- Recompile packages invalidated by column drop
-    EXECUTE IMMEDIATE 'ALTER PACKAGE CT_MRDS.ENV_MANAGER COMPILE BODY';
-    EXECUTE IMMEDIATE 'ALTER PACKAGE CT_MRDS.FILE_MANAGER COMPILE';
-    EXECUTE IMMEDIATE 'ALTER PACKAGE CT_MRDS.FILE_MANAGER COMPILE BODY';
-    EXECUTE IMMEDIATE 'ALTER PACKAGE CT_MRDS.FILE_ARCHIVER COMPILE';
-    EXECUTE IMMEDIATE 'ALTER PACKAGE CT_MRDS.FILE_ARCHIVER COMPILE BODY';
-    DBMS_OUTPUT.PUT_LINE('Dependent packages recompiled.');
+    DBMS_OUTPUT.PUT_LINE('Column A_WORKFLOW_HISTORY_KEY dropped from A_SOURCE_FILE_RECEIVED.');
 EXCEPTION
     WHEN OTHERS THEN
-        DBMS_OUTPUT.PUT_LINE('ERROR dropping column: ' || SQLERRM);
-        RAISE;
+        IF SQLCODE = -904 THEN
+            DBMS_OUTPUT.PUT_LINE('SKIP: Column A_WORKFLOW_HISTORY_KEY does not exist in A_SOURCE_FILE_RECEIVED.');
+        ELSE
+            RAISE;
+        END IF;
 END;
 /
 
 PROMPT
+PROMPT Rollback 99 completed: A_WORKFLOW_HISTORY_KEY column removed from A_SOURCE_FILE_RECEIVED.
+PROMPT
diff --git a/MARS_Packages/REL02_POST/MARS-1409/new_version/A_SOURCE_FILE_CONFIG.sql b/MARS_Packages/REL02_POST/MARS-1409/new_version/A_SOURCE_FILE_CONFIG.sql
index 08f32e5..74f7ea6 100644
--- a/MARS_Packages/REL02_POST/MARS-1409/new_version/A_SOURCE_FILE_CONFIG.sql
+++ b/MARS_Packages/REL02_POST/MARS-1409/new_version/A_SOURCE_FILE_CONFIG.sql
@@ -39,16 +39,6 @@ CREATE TABLE CT_MRDS.A_SOURCE_FILE_CONFIG (
     CONSTRAINT A_SOURCE_FILE_CONFIG_UQ1 UNIQUE(SOURCE_FILE_TYPE, SOURCE_FILE_ID, TABLE_ID)
 ) TABLESPACE "DATA";
 
--- Primary key index (from production export)
-CREATE UNIQUE INDEX "CT_MRDS"."A_SOURCE_FILE_CONFIG_PK" 
-ON "CT_MRDS"."A_SOURCE_FILE_CONFIG" ("A_SOURCE_FILE_CONFIG_KEY") 
-TABLESPACE "DATA";
-
--- Unique constraint index (from production export)
-CREATE UNIQUE INDEX "CT_MRDS"."A_SOURCE_FILE_CONFIG_UQ1" 
-ON "CT_MRDS"."A_SOURCE_FILE_CONFIG" ("SOURCE_FILE_TYPE", "SOURCE_FILE_ID", "TABLE_ID") 
-TABLESPACE "DATA";
-
 -- Column comments
 COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.A_SOURCE_FILE_CONFIG_KEY IS 
     'Primary key - unique identifier for source file configuration record';
diff --git a/MARS_Packages/REL02_POST/MARS-1409/new_version/A_TABLE_STAT.sql b/MARS_Packages/REL02_POST/MARS-1409/new_version/A_TABLE_STAT.sql
index c99835b..7262276 100644
--- a/MARS_Packages/REL02_POST/MARS-1409/new_version/A_TABLE_STAT.sql
+++ b/MARS_Packages/REL02_POST/MARS-1409/new_version/A_TABLE_STAT.sql
@@ -5,34 +5,52 @@
 -- ====================================================================
 
 CREATE TABLE CT_MRDS.A_TABLE_STAT (
-    A_TABLE_STAT_KEY                  NUMBER(38,0) PRIMARY KEY, 
+    -- === Identity / metadata ===
+    A_TABLE_STAT_KEY                  NUMBER(38,0) PRIMARY KEY,
     A_SOURCE_FILE_CONFIG_KEY          NUMBER(38,0) NOT NULL,
     TABLE_NAME                        VARCHAR2(200) NOT NULL,
-    FILE_COUNT                        NUMBER(38,0),
-    OVER_ARCH_THRESOLD_FILE_COUNT     NUMBER(38,0),
-    ROW_COUNT                         NUMBER(38,0), 
-    OVER_ARCH_THRESOLD_ROW_COUNT      NUMBER(38,0), 
-    SIZE                              NUMBER(38,0),
-    OVER_ARCH_THRESOLD_SIZE           NUMBER(38,0),
-    ARCH_THRESHOLD_DAYS               NUMBER(4,0),
     CREATED                           TIMESTAMP(6) DEFAULT SYSTIMESTAMP,
+    -- === Archival configuration snapshot (values at gather time) ===
     ARCHIVAL_STRATEGY                 VARCHAR2(30),
     ARCH_MINIMUM_AGE_MONTHS           NUMBER(4,0),
+    ARCH_THRESHOLD_DAYS               NUMBER(4,0),
     IS_WORKFLOW_SUCCESS_REQUIRED      CHAR(1),
+    -- === Total statistics (all files, no workflow filter) ===
+    FILE_COUNT                        NUMBER(38,0),
+    ROW_COUNT                         NUMBER(38,0),
+    TOTAL_SIZE                        NUMBER(38,0),
+    -- === Over-archival-threshold statistics ===
+    OVER_ARCH_THRESOLD_FILE_COUNT     NUMBER(38,0),
+    OVER_ARCH_THRESOLD_ROW_COUNT      NUMBER(38,0),
+    OVER_ARCH_THRESOLD_TOTAL_SIZE     NUMBER(38,0),
+    -- === Workflow-success statistics (WORKFLOW_SUCCESSFUL='Y' files only) ===
     WORKFLOW_SUCCESS_FILE_COUNT       NUMBER(38,0),
     WORKFLOW_SUCCESS_ROW_COUNT        NUMBER(38,0),
-    WORKFLOW_SUCCESS_SIZE             NUMBER(38,0),
+    WORKFLOW_SUCCESS_TOTAL_SIZE       NUMBER(38,0),
     CONSTRAINT A_TABLE_STAT_UK1 UNIQUE(A_SOURCE_FILE_CONFIG_KEY)
 ) TABLESPACE "DATA";
 
-COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.ARCHIVAL_STRATEGY IS 'Archival strategy used when statistics were gathered (THRESHOLD_BASED, MINIMUM_AGE_MONTHS, HYBRID). Populated by FILE_ARCHIVER.GATHER_TABLE_STAT (MARS-1409)';
-COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.ARCH_MINIMUM_AGE_MONTHS IS 'Minimum age threshold in months used when statistics were gathered. Populated for MINIMUM_AGE_MONTHS and HYBRID strategies; NULL for THRESHOLD_BASED. Complements ARCH_THRESHOLD_DAYS. Populated by FILE_ARCHIVER.GATHER_TABLE_STAT (MARS-1409)';
-COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.IS_WORKFLOW_SUCCESS_REQUIRED IS 'Reflects IS_WORKFLOW_SUCCESS_REQUIRED value from A_SOURCE_FILE_CONFIG when statistics were gathered. Y=OVER_ARCH_THRESOLD counts include only WORKFLOW_SUCCESSFUL=Y rows. Added MARS-1409';
-COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.WORKFLOW_SUCCESS_FILE_COUNT IS 'Count of files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409';
-COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.WORKFLOW_SUCCESS_ROW_COUNT IS 'Row count for files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409';
-COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.WORKFLOW_SUCCESS_SIZE IS 'Size in bytes for files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409';
+-- Identity / metadata
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.A_TABLE_STAT_KEY             IS 'Primary key, populated from A_TABLE_STAT_KEY_SEQ sequence.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.A_SOURCE_FILE_CONFIG_KEY     IS 'Foreign key to A_SOURCE_FILE_CONFIG; one current-stat row per config entry (unique constraint A_TABLE_STAT_UK1).';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.TABLE_NAME                   IS 'Fully qualified ODS external table name (SCHEMA.TABLE) for which statistics were gathered.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.CREATED                      IS 'Timestamp when the statistics were gathered by FILE_ARCHIVER.GATHER_TABLE_STAT.';
+-- Archival configuration snapshot
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.ARCHIVAL_STRATEGY            IS 'Archival strategy active when statistics were gathered (THRESHOLD_BASED, MINIMUM_AGE_MONTHS, HYBRID). Populated by FILE_ARCHIVER.GATHER_TABLE_STAT (MARS-1409).';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.ARCH_MINIMUM_AGE_MONTHS      IS 'Minimum age threshold in months copied from A_SOURCE_FILE_CONFIG.MINIMUM_AGE_MONTHS. Populated for MINIMUM_AGE_MONTHS and HYBRID strategies; NULL for THRESHOLD_BASED. Populated by FILE_ARCHIVER.GATHER_TABLE_STAT (MARS-1409).';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.ARCH_THRESHOLD_DAYS          IS 'Archive threshold in days copied from A_SOURCE_FILE_CONFIG.ARCHIVE_THRESHOLD_DAYS. Used by THRESHOLD_BASED and HYBRID strategies.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.IS_WORKFLOW_SUCCESS_REQUIRED IS 'Snapshot of A_SOURCE_FILE_CONFIG.IS_WORKFLOW_SUCCESS_REQUIRED at gather time. Y = OVER_ARCH_THRESOLD counts include only files with WORKFLOW_SUCCESSFUL=Y. Added MARS-1409.';
+-- Total statistics
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.FILE_COUNT                   IS 'Total number of files present in the ODS external table, regardless of workflow success status.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.ROW_COUNT                    IS 'Total row count across all files in the ODS external table.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.TOTAL_SIZE                        IS 'Total size in bytes of all files in the ODS bucket location.';
+-- Over-threshold statistics
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.OVER_ARCH_THRESOLD_FILE_COUNT    IS 'Number of files that satisfy the archival threshold condition. When IS_WORKFLOW_SUCCESS_REQUIRED=Y, also requires WORKFLOW_SUCCESSFUL=Y.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.OVER_ARCH_THRESOLD_ROW_COUNT     IS 'Row count for files that satisfy the archival threshold condition.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.OVER_ARCH_THRESOLD_TOTAL_SIZE    IS 'Size in bytes for files that satisfy the archival threshold condition.';
+-- Workflow-success statistics
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.WORKFLOW_SUCCESS_FILE_COUNT      IS 'Count of files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.WORKFLOW_SUCCESS_ROW_COUNT       IS 'Row count for files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT.WORKFLOW_SUCCESS_TOTAL_SIZE      IS 'Size in bytes for files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409.';
 
--- Unique constraint index (from production export)
-CREATE UNIQUE INDEX "CT_MRDS"."A_TABLE_STAT_UK1" 
-ON "CT_MRDS"."A_TABLE_STAT" ("A_SOURCE_FILE_CONFIG_KEY") 
-TABLESPACE "DATA";
\ No newline at end of file
+-- Note: A_TABLE_STAT_UK1 index is auto-created by the UNIQUE constraint definition above.
\ No newline at end of file
diff --git a/MARS_Packages/REL02_POST/MARS-1409/new_version/A_TABLE_STAT_HIST.sql b/MARS_Packages/REL02_POST/MARS-1409/new_version/A_TABLE_STAT_HIST.sql
index 825e0be..f713bcc 100644
--- a/MARS_Packages/REL02_POST/MARS-1409/new_version/A_TABLE_STAT_HIST.sql
+++ b/MARS_Packages/REL02_POST/MARS-1409/new_version/A_TABLE_STAT_HIST.sql
@@ -5,28 +5,49 @@
 -- ====================================================================
 
 CREATE TABLE CT_MRDS.A_TABLE_STAT_HIST (
-    A_TABLE_STAT_HIST_KEY             NUMBER(38,0) PRIMARY KEY, 
+    -- === Identity / metadata ===
+    A_TABLE_STAT_HIST_KEY             NUMBER(38,0) PRIMARY KEY,
     A_SOURCE_FILE_CONFIG_KEY          NUMBER(38,0) NOT NULL,
     TABLE_NAME                        VARCHAR2(200) NOT NULL,
-    FILE_COUNT                        NUMBER(38,0),
-    OVER_ARCH_THRESOLD_FILE_COUNT     NUMBER(38,0),
-    ROW_COUNT                         NUMBER(38,0), 
-    OVER_ARCH_THRESOLD_ROW_COUNT      NUMBER(38,0), 
-    SIZE                              NUMBER(38,0),
-    OVER_ARCH_THRESOLD_SIZE           NUMBER(38,0),
-    ARCH_THRESHOLD_DAYS               NUMBER(4,0),
     CREATED                           TIMESTAMP(6) DEFAULT SYSTIMESTAMP,
+    -- === Archival configuration snapshot (values at gather time) ===
     ARCHIVAL_STRATEGY                 VARCHAR2(30),
     ARCH_MINIMUM_AGE_MONTHS           NUMBER(4,0),
+    ARCH_THRESHOLD_DAYS               NUMBER(4,0),
     IS_WORKFLOW_SUCCESS_REQUIRED      CHAR(1),
+    -- === Total statistics (all files, no workflow filter) ===
+    FILE_COUNT                        NUMBER(38,0),
+    ROW_COUNT                         NUMBER(38,0),
+    TOTAL_SIZE                        NUMBER(38,0),
+    -- === Over-archival-threshold statistics ===
+    OVER_ARCH_THRESOLD_FILE_COUNT     NUMBER(38,0),
+    OVER_ARCH_THRESOLD_ROW_COUNT      NUMBER(38,0),
+    OVER_ARCH_THRESOLD_TOTAL_SIZE     NUMBER(38,0),
+    -- === Workflow-success statistics (WORKFLOW_SUCCESSFUL='Y' files only) ===
     WORKFLOW_SUCCESS_FILE_COUNT       NUMBER(38,0),
     WORKFLOW_SUCCESS_ROW_COUNT        NUMBER(38,0),
-    WORKFLOW_SUCCESS_SIZE             NUMBER(38,0)
+    WORKFLOW_SUCCESS_TOTAL_SIZE       NUMBER(38,0)
 ) TABLESPACE "DATA";
 
-COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.ARCHIVAL_STRATEGY IS 'Archival strategy used when statistics were gathered (THRESHOLD_BASED, MINIMUM_AGE_MONTHS, HYBRID). Populated by FILE_ARCHIVER.GATHER_TABLE_STAT (MARS-1409)';
-COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.ARCH_MINIMUM_AGE_MONTHS IS 'Minimum age threshold in months used when statistics were gathered. Populated for MINIMUM_AGE_MONTHS and HYBRID strategies; NULL for THRESHOLD_BASED. Complements ARCH_THRESHOLD_DAYS. Populated by FILE_ARCHIVER.GATHER_TABLE_STAT (MARS-1409)';
-COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.IS_WORKFLOW_SUCCESS_REQUIRED IS 'Reflects IS_WORKFLOW_SUCCESS_REQUIRED value from A_SOURCE_FILE_CONFIG when statistics were gathered. Y=OVER_ARCH_THRESOLD counts include only WORKFLOW_SUCCESSFUL=Y rows. Added MARS-1409';
-COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.WORKFLOW_SUCCESS_FILE_COUNT IS 'Count of files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409';
-COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.WORKFLOW_SUCCESS_ROW_COUNT IS 'Row count for files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409';
-COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.WORKFLOW_SUCCESS_SIZE IS 'Size in bytes for files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409';
\ No newline at end of file
+-- Identity / metadata
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.A_TABLE_STAT_HIST_KEY        IS 'Primary key, populated from A_TABLE_STAT_KEY_SEQ sequence (shared with A_TABLE_STAT).';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.A_SOURCE_FILE_CONFIG_KEY     IS 'Foreign key to A_SOURCE_FILE_CONFIG. Multiple history rows per config entry (no unique constraint).';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.TABLE_NAME                   IS 'Fully qualified ODS external table name (SCHEMA.TABLE) for which statistics were gathered.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.CREATED                      IS 'Timestamp when the statistics snapshot was taken by FILE_ARCHIVER.GATHER_TABLE_STAT.';
+-- Archival configuration snapshot
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.ARCHIVAL_STRATEGY            IS 'Archival strategy active when statistics were gathered (THRESHOLD_BASED, MINIMUM_AGE_MONTHS, HYBRID). Populated by FILE_ARCHIVER.GATHER_TABLE_STAT (MARS-1409).';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.ARCH_MINIMUM_AGE_MONTHS      IS 'Minimum age threshold in months copied from A_SOURCE_FILE_CONFIG.MINIMUM_AGE_MONTHS. Populated for MINIMUM_AGE_MONTHS and HYBRID strategies; NULL for THRESHOLD_BASED. Populated by FILE_ARCHIVER.GATHER_TABLE_STAT (MARS-1409).';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.ARCH_THRESHOLD_DAYS          IS 'Archive threshold in days copied from A_SOURCE_FILE_CONFIG.ARCHIVE_THRESHOLD_DAYS. Used by THRESHOLD_BASED and HYBRID strategies.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.IS_WORKFLOW_SUCCESS_REQUIRED IS 'Snapshot of A_SOURCE_FILE_CONFIG.IS_WORKFLOW_SUCCESS_REQUIRED at gather time. Y = OVER_ARCH_THRESOLD counts include only files with WORKFLOW_SUCCESSFUL=Y. Added MARS-1409.';
+-- Total statistics
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.FILE_COUNT                   IS 'Total number of files present in the ODS external table at gather time, regardless of workflow success status.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.ROW_COUNT                    IS 'Total row count across all files in the ODS external table at gather time.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.TOTAL_SIZE                        IS 'Total size in bytes of all files in the ODS bucket location at gather time.';
+-- Over-threshold statistics
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.OVER_ARCH_THRESOLD_FILE_COUNT    IS 'Number of files that satisfied the archival threshold condition. When IS_WORKFLOW_SUCCESS_REQUIRED=Y, also required WORKFLOW_SUCCESSFUL=Y.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.OVER_ARCH_THRESOLD_ROW_COUNT     IS 'Row count for files that satisfied the archival threshold condition.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.OVER_ARCH_THRESOLD_TOTAL_SIZE    IS 'Size in bytes for files that satisfied the archival threshold condition.';
+-- Workflow-success statistics
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.WORKFLOW_SUCCESS_FILE_COUNT      IS 'Count of files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.WORKFLOW_SUCCESS_ROW_COUNT       IS 'Row count for files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409.';
+COMMENT ON COLUMN CT_MRDS.A_TABLE_STAT_HIST.WORKFLOW_SUCCESS_TOTAL_SIZE      IS 'Size in bytes for files with WORKFLOW_SUCCESSFUL=Y. Always populated regardless of IS_WORKFLOW_SUCCESS_REQUIRED flag. Added MARS-1409.';
\ No newline at end of file
diff --git a/MARS_Packages/REL02_POST/MARS-1409/new_version/FILE_ARCHIVER.pkb b/MARS_Packages/REL02_POST/MARS-1409/new_version/FILE_ARCHIVER.pkb
index b009ed7..5d0bf61 100644
--- a/MARS_Packages/REL02_POST/MARS-1409/new_version/FILE_ARCHIVER.pkb
+++ b/MARS_Packages/REL02_POST/MARS-1409/new_version/FILE_ARCHIVER.pkb
@@ -143,8 +143,8 @@ AS
       ELSE
          -- THRESHOLD_BASED and HYBRID: Check thresholds
          if    vTableStat.OVER_ARCH_THRESOLD_FILE_COUNT  >= vSourceFileConfig.ARCHIVE_THRESHOLD_FILES_COUNT then vArchivalTriggeredBy := 'FILES_COUNT';
-         elsif vTableStat.OVER_ARCH_THRESOLD_ROW_COUNT   >= vSourceFileConfig.ARCHIVE_THRESHOLD_ROWS_COUNT  then vArchivalTriggeredBy := vArchivalTriggeredBy||', ROWS_COUNT';
-         elsif vTableStat.OVER_ARCH_THRESOLD_SIZE        >= vSourceFileConfig.ARCHIVE_THRESHOLD_BYTES_SUM   then vArchivalTriggeredBy := vArchivalTriggeredBy||', BYTES_SUM';
+         elsif vTableStat.OVER_ARCH_THRESOLD_ROW_COUNT         >= vSourceFileConfig.ARCHIVE_THRESHOLD_ROWS_COUNT  then vArchivalTriggeredBy := vArchivalTriggeredBy||', ROWS_COUNT';
+         elsif vTableStat.OVER_ARCH_THRESOLD_TOTAL_SIZE       >= vSourceFileConfig.ARCHIVE_THRESHOLD_BYTES_SUM   then vArchivalTriggeredBy := vArchivalTriggeredBy||', BYTES_SUM';
          else CT_MRDS.ENV_MANAGER.LOG_PROCESS_EVENT('Non of archival triggers reached','INFO');
          end if;
       END IF;
@@ -480,7 +480,7 @@ AS
       CT_MRDS.ENV_MANAGER.LOG_PROCESS_EVENT('vOverThresholdWhereClause','DEBUG',vOverThresholdWhereClause);
 
       -- Use strategy-based WHERE clause for statistics (MARS-828)
-      -- FILE_COUNT, ROW_COUNT, SIZE: all files regardless of workflow success (never zero due to workflow filter)
+      -- FILE_COUNT, ROW_COUNT, TOTAL_SIZE: all files regardless of workflow success (never zero due to workflow filter)
       -- OVER_ARCH_THRESOLD_*: IS_WORKFLOW_SUCCESS_REQUIRED-aware count of eligible files
       -- WORKFLOW_SUCCESS_*: informational count of files with WORKFLOW_SUCCESSFUL='Y'
       vQuery := 
@@ -513,7 +513,7 @@ AS
          ,nvl(sum(case when ' || vOverThresholdWhereClause || ' then 1 else 0 end), 0) as OLD_FILE_COUNT
          ,nvl(sum(row_count_per_file), 0) as ROW_COUNT
          ,nvl(sum(case when ' || vOverThresholdWhereClause || ' then row_count_per_file else 0 end), 0) as OLD_ROW_COUNT
-         ,nvl(sum(r.bytes), 0) as BYTES
+         ,nvl(sum(r.bytes), 0) as TOTAL_SIZE
          ,nvl(sum(case when ' || vOverThresholdWhereClause || ' then r.bytes else 0 end), 0) as OLD_BYTES
          ,'||COALESCE(TO_CHAR(vSourceFileConfig.ARCHIVE_THRESHOLD_DAYS), 'NULL')||' as ARCHIVE_THRESHOLD_DAYS
          ,systimestamp as CREATED
@@ -522,7 +522,7 @@ AS
          ,'''||vSourceFileConfig.IS_WORKFLOW_SUCCESS_REQUIRED||''' as IS_WORKFLOW_SUCCESS_REQUIRED
          ,nvl(sum(case when workflow_successful = ''Y'' then 1 else 0 end), 0) as WORKFLOW_SUCCESS_FILE_COUNT
          ,nvl(sum(case when workflow_successful = ''Y'' then row_count_per_file else 0 end), 0) as WORKFLOW_SUCCESS_ROW_COUNT
-         ,nvl(sum(case when workflow_successful = ''Y'' then r.bytes else 0 end), 0) as WORKFLOW_SUCCESS_SIZE
+         ,nvl(sum(case when workflow_successful = ''Y'' then r.bytes else 0 end), 0) as WORKFLOW_SUCCESS_TOTAL_SIZE
       from tmp_gr t
       join (SELECT * from DBMS_CLOUD.LIST_OBJECTS(
                       credential_name => '''||CT_MRDS.ENV_MANAGER.gvCredentialName||''',
@@ -545,8 +545,8 @@ AS
                vStats.OVER_ARCH_THRESOLD_FILE_COUNT   := 0;
                vStats.ROW_COUNT                       := 0;
                vStats.OVER_ARCH_THRESOLD_ROW_COUNT    := 0;
-               vStats."SIZE"                          := 0;
-               vStats.OVER_ARCH_THRESOLD_SIZE         := 0;
+               vStats.TOTAL_SIZE                      := 0;
+               vStats.OVER_ARCH_THRESOLD_TOTAL_SIZE   := 0;
                vStats.ARCH_THRESHOLD_DAYS             := vSourceFileConfig.ARCHIVE_THRESHOLD_DAYS;
                vStats.CREATED                         := SYSTIMESTAMP;
                vStats.ARCHIVAL_STRATEGY               := vSourceFileConfig.ARCHIVAL_STRATEGY;
@@ -554,7 +554,7 @@ AS
                vStats.IS_WORKFLOW_SUCCESS_REQUIRED     := vSourceFileConfig.IS_WORKFLOW_SUCCESS_REQUIRED;
                vStats.WORKFLOW_SUCCESS_FILE_COUNT      := 0;
                vStats.WORKFLOW_SUCCESS_ROW_COUNT       := 0;
-               vStats.WORKFLOW_SUCCESS_SIZE            := 0;
+               vStats.WORKFLOW_SUCCESS_TOTAL_SIZE      := 0;
             ELSE
                RAISE;
             END IF;
diff --git a/MARS_Packages/REL02_POST/MARS-1409/rollback_mars1409.sql b/MARS_Packages/REL02_POST/MARS-1409/rollback_mars1409.sql
index bb83fd6..4030f60 100644
--- a/MARS_Packages/REL02_POST/MARS-1409/rollback_mars1409.sql
+++ b/MARS_Packages/REL02_POST/MARS-1409/rollback_mars1409.sql
@@ -32,7 +32,7 @@ PROMPT MARS-1409 Rollback Starting
 PROMPT ============================================================================
 PROMPT Package: CT_MRDS.FILE_MANAGER
 PROMPT Change: Remove A_WORKFLOW_HISTORY_KEY column and restore previous version
-PROMPT Steps: 11 (Restore FILE_ARCHIVER, Restore FILE_MANAGER, Restore ENV_MANAGER, Restore trigger, Drop ARCHIVAL_STRATEGY/ARCH_MINIMUM_AGE_MONTHS/IS_WORKFLOW_SUCCESS_REQUIRED/WORKFLOW_SUCCESS_* columns, Drop column, Verify)
+PROMPT Steps: 11 (Drop tables/columns first, then Restore ENV_MANAGER, FILE_MANAGER, FILE_ARCHIVER (dependency order), Restore trigger, Verify)
 PROMPT Timestamp: 
 SELECT TO_CHAR(SYSDATE, 'YYYY-MM-DD HH24:MI:SS') AS rollback_start FROM DUAL;
 PROMPT ============================================================================
@@ -49,58 +49,59 @@ END;
 
 PROMPT
 PROMPT ============================================================================
-PROMPT STEP 1: Restore FILE_ARCHIVER package specification (previous version)
-PROMPT ============================================================================
-@@91_MARS_1409_rollback_CT_MRDS_FILE_ARCHIVER_SPEC.sql
-
-PROMPT
-PROMPT ============================================================================
-PROMPT STEP 2: Restore FILE_ARCHIVER package body (previous version)
-PROMPT ============================================================================
-@@92_MARS_1409_rollback_CT_MRDS_FILE_ARCHIVER_BODY.sql
-
-PROMPT
-PROMPT ============================================================================
-PROMPT STEP 3: Restore FILE_MANAGER package specification (previous version)
-PROMPT ============================================================================
-@@93_MARS_1409_rollback_CT_MRDS_FILE_MANAGER_SPEC.sql
-
-PROMPT
-PROMPT ============================================================================
-PROMPT STEP 4: Restore FILE_MANAGER package body (previous version)
-PROMPT ============================================================================
-@@94_MARS_1409_rollback_CT_MRDS_FILE_MANAGER_BODY.sql
-
-PROMPT
-PROMPT ============================================================================
-PROMPT STEP 5: Restore ENV_MANAGER package specification (previous version)
-PROMPT ============================================================================
-@@95_MARS_1409_rollback_CT_MRDS_ENV_MANAGER_SPEC.sql
-
-PROMPT
-PROMPT ============================================================================
-PROMPT STEP 6: Restore ENV_MANAGER package body (previous version)
-PROMPT ============================================================================
-@@96_MARS_1409_rollback_CT_MRDS_ENV_MANAGER_BODY.sql
-
-PROMPT
-PROMPT ============================================================================
-PROMPT STEP 7: Restore A_WORKFLOW_HISTORY trigger (previous version)
-PROMPT ============================================================================
-@@97_MARS_1409_rollback_CT_MRDS_A_WORKFLOW_HISTORY.sql
-
-PROMPT
-PROMPT ============================================================================
-PROMPT STEP 8: Drop ARCHIVAL_STRATEGY, ARCH_MINIMUM_AGE_MONTHS, IS_WORKFLOW_SUCCESS_REQUIRED and WORKFLOW_SUCCESS_FILE_COUNT/ROW_COUNT/SIZE columns from A_TABLE_STAT and A_TABLE_STAT_HIST
+PROMPT STEP 1: Drop A_TABLE_STAT, A_TABLE_STAT_HIST and IS_WORKFLOW_SUCCESS_REQUIRED column
+PROMPT         (must be done BEFORE compiling rollback packages so column names match)
 PROMPT ============================================================================
 @@98_MARS_1409_rollback_archival_strategy_column.sql
 
 PROMPT
 PROMPT ============================================================================
-PROMPT STEP 9: Drop A_WORKFLOW_HISTORY_KEY column
+PROMPT STEP 2: Drop A_WORKFLOW_HISTORY_KEY column from A_SOURCE_FILE_RECEIVED
 PROMPT ============================================================================
 @@99_MARS_1409_rollback_workflow_history_key_column.sql
 
+PROMPT
+PROMPT ============================================================================
+PROMPT STEP 3: Restore ENV_MANAGER package specification (previous version)
+PROMPT ============================================================================
+@@95_MARS_1409_rollback_CT_MRDS_ENV_MANAGER_SPEC.sql
+
+PROMPT
+PROMPT ============================================================================
+PROMPT STEP 4: Restore ENV_MANAGER package body (previous version)
+PROMPT ============================================================================
+@@96_MARS_1409_rollback_CT_MRDS_ENV_MANAGER_BODY.sql
+
+PROMPT
+PROMPT ============================================================================
+PROMPT STEP 5: Restore FILE_MANAGER package specification (previous version)
+PROMPT ============================================================================
+@@93_MARS_1409_rollback_CT_MRDS_FILE_MANAGER_SPEC.sql
+
+PROMPT
+PROMPT ============================================================================
+PROMPT STEP 6: Restore FILE_MANAGER package body (previous version)
+PROMPT ============================================================================
+@@94_MARS_1409_rollback_CT_MRDS_FILE_MANAGER_BODY.sql
+
+PROMPT
+PROMPT ============================================================================
+PROMPT STEP 7: Restore FILE_ARCHIVER package specification (previous version)
+PROMPT ============================================================================
+@@91_MARS_1409_rollback_CT_MRDS_FILE_ARCHIVER_SPEC.sql
+
+PROMPT
+PROMPT ============================================================================
+PROMPT STEP 8: Restore FILE_ARCHIVER package body (previous version)
+PROMPT ============================================================================
+@@92_MARS_1409_rollback_CT_MRDS_FILE_ARCHIVER_BODY.sql
+
+PROMPT
+PROMPT ============================================================================
+PROMPT STEP 9: Restore A_WORKFLOW_HISTORY trigger (previous version)
+PROMPT ============================================================================
+@@97_MARS_1409_rollback_CT_MRDS_A_WORKFLOW_HISTORY.sql
+
 PROMPT
 PROMPT ============================================================================
 PROMPT STEP 10: Verify rollback
diff --git a/MARS_Packages/REL02_POST/MARS-1409/rollback_version/A_SOURCE_FILE_CONFIG.sql b/MARS_Packages/REL02_POST/MARS-1409/rollback_version/A_SOURCE_FILE_CONFIG.sql
new file mode 100644
index 0000000..9b61532
--- /dev/null
+++ b/MARS_Packages/REL02_POST/MARS-1409/rollback_version/A_SOURCE_FILE_CONFIG.sql
@@ -0,0 +1,101 @@
+-- ====================================================================
+-- A_SOURCE_FILE_CONFIG Table (rollback_version - pre MARS-1409)
+-- ====================================================================
+-- Purpose: Store source file configuration and processing rules
+-- MARS-1049: Added ENCODING column for CSV character set support
+-- MARS-828: Added ARCHIVAL_STRATEGY and MINIMUM_AGE_MONTHS for archival automation
+-- NOTE: IS_WORKFLOW_SUCCESS_REQUIRED column NOT included (added by MARS-1409)
+-- ====================================================================
+
+CREATE TABLE CT_MRDS.A_SOURCE_FILE_CONFIG (
+    A_SOURCE_FILE_CONFIG_KEY NUMBER(38,0) NOT NULL ENABLE, 
+    A_SOURCE_KEY VARCHAR2(30) NOT NULL ENABLE,
+    SOURCE_FILE_TYPE VARCHAR2(200), -- Can be 'INPUT' or 'CONTAINER' or 'LOAD_CONFIG'
+    SOURCE_FILE_ID VARCHAR2(200), 
+    SOURCE_FILE_DESC VARCHAR2(2000), 
+    SOURCE_FILE_NAME_PATTERN VARCHAR2(200), 
+    TABLE_ID VARCHAR2(200), 
+    TEMPLATE_TABLE_NAME VARCHAR2(200), 
+    CONTAINER_FILE_KEY NUMBER(38,0),
+    ARCHIVE_THRESHOLD_DAYS NUMBER(4,0), 
+    ARCHIVE_THRESHOLD_FILES_COUNT NUMBER(38,0), 
+    ARCHIVE_THRESHOLD_BYTES_SUM NUMBER(38,0), 
+    ODS_SCHEMA_NAME VARCHAR2(100), 
+    ARCHIVE_THRESHOLD_ROWS_COUNT NUMBER(38,0), 
+    HOURS_TO_EXPIRE_STATISTICS NUMBER(38,3),
+    ARCHIVAL_STRATEGY VARCHAR2(50),
+    MINIMUM_AGE_MONTHS NUMBER(3,0),
+    ENCODING VARCHAR2(50) DEFAULT 'UTF8',
+    IS_ARCHIVE_ENABLED CHAR(1) DEFAULT 'N' NOT NULL,
+    IS_KEEP_IN_TRASH CHAR(1) DEFAULT 'N' NOT NULL,
+    CONSTRAINT A_SOURCE_FILE_CONFIG_PK PRIMARY KEY (A_SOURCE_FILE_CONFIG_KEY),
+    CONSTRAINT CHK_IS_ARCHIVE_ENABLED CHECK (IS_ARCHIVE_ENABLED IN ('Y', 'N')),
+    CONSTRAINT CHK_IS_KEEP_IN_TRASH CHECK (IS_KEEP_IN_TRASH IN ('Y', 'N')),
+    CONSTRAINT SOURCE_FILE_TYPE_CHK CHECK (SOURCE_FILE_TYPE IN ('INPUT', 'CONTAINER', 'LOAD_CONFIG')),
+    CONSTRAINT ASFC_A_SOURCE_KEY_FK FOREIGN KEY(A_SOURCE_KEY) REFERENCES CT_MRDS.A_SOURCE(A_SOURCE_KEY),
+    CONSTRAINT ASFC_CONTAINER_FILE_KEY_FK FOREIGN KEY(CONTAINER_FILE_KEY) REFERENCES CT_MRDS.A_SOURCE_FILE_CONFIG(A_SOURCE_FILE_CONFIG_KEY),
+    CONSTRAINT A_SOURCE_FILE_CONFIG_UQ1 UNIQUE(SOURCE_FILE_TYPE, SOURCE_FILE_ID, TABLE_ID)
+) TABLESPACE "DATA";
+
+-- Column comments
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.A_SOURCE_FILE_CONFIG_KEY IS 
+    'Primary key - unique identifier for source file configuration record';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.A_SOURCE_KEY IS 
+    'Foreign key to A_SOURCE table - identifies the source system (e.g., LM, C2D, CSDB)';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.SOURCE_FILE_TYPE IS 
+    'Type of file configuration: INPUT (data files), CONTAINER (xml files), or LOAD_CONFIG (configuration files)';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.SOURCE_FILE_ID IS 
+    'Unique identifier for the source file within the source system (e.g., UC_DISSEM, STANDING_FACILITIES)';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.SOURCE_FILE_DESC IS 
+    'Human-readable description of the source file and its purpose';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.SOURCE_FILE_NAME_PATTERN IS 
+    'Filename pattern for matching incoming files (supports wildcards, e.g., UC_NMA_DISSEM-*.csv)';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.TABLE_ID IS 
+    'Identifier for the target table where data will be loaded (without schema prefix)';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.TEMPLATE_TABLE_NAME IS 
+    'Fully qualified name of template table in CT_ET_TEMPLATES schema used for external table creation';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.CONTAINER_FILE_KEY IS 
+    'Foreign key to parent container configuration when this file is part of an xml (NULL for standalone files)';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.ARCHIVE_THRESHOLD_DAYS IS 
+    'Threshold for THRESHOLD_BASED strategy: archive data older than N days';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.ARCHIVE_THRESHOLD_FILES_COUNT IS 
+    'Trigger archival when file count exceeds this threshold (used in THRESHOLD_BASED and HYBRID strategies)';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.ARCHIVE_THRESHOLD_BYTES_SUM IS 
+    'Trigger archival when total size in bytes exceeds this threshold (used in THRESHOLD_BASED and HYBRID strategies)';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.ARCHIVE_THRESHOLD_ROWS_COUNT IS 
+    'Trigger archival when total row count exceeds this threshold (used in THRESHOLD_BASED and HYBRID strategies)';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.ODS_SCHEMA_NAME IS 
+    'Schema name where ODS external tables are created (typically ODS)';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.HOURS_TO_EXPIRE_STATISTICS IS 
+    'Number of hours before table statistics expire and need to be recalculated';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.ARCHIVAL_STRATEGY IS 
+    'Archival strategy: THRESHOLD_BASED (days-based), MINIMUM_AGE_MONTHS (0=current month, N=retain N months), HYBRID (combination)';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.MINIMUM_AGE_MONTHS IS 
+    'Minimum age in months before archival (required for MINIMUM_AGE_MONTHS and HYBRID strategies, 0=current month only)';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.ENCODING IS 
+    'Oracle character set name for CSV files (e.g., UTF8, WE8MSWIN1252, EE8ISO8859P2)';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.IS_ARCHIVE_ENABLED IS 
+    'Y=Enable archiving, N=Skip archiving. Controls if table participates in archival process';
+
+COMMENT ON COLUMN CT_MRDS.A_SOURCE_FILE_CONFIG.IS_KEEP_IN_TRASH IS 
+    'Y=Keep files in TRASH after archiving, N=Delete immediately. Controls TRASH retention policy';
+
+GRANT SELECT, INSERT, UPDATE, DELETE ON CT_MRDS.A_SOURCE_FILE_CONFIG TO MRDS_LOADER_ROLE;
diff --git a/MARS_Packages/REL02_POST/MARS-1409/rollback_version/A_TABLE_STAT.sql b/MARS_Packages/REL02_POST/MARS-1409/rollback_version/A_TABLE_STAT.sql
new file mode 100644
index 0000000..cb77a93
--- /dev/null
+++ b/MARS_Packages/REL02_POST/MARS-1409/rollback_version/A_TABLE_STAT.sql
@@ -0,0 +1,26 @@
+-- ====================================================================
+-- A_TABLE_STAT Table (rollback_version - pre MARS-1409)
+-- ====================================================================
+-- Purpose: Store current table statistics and archival thresholds
+-- NOTE: This is the pre-MARS-1409 structure without:
+--   ARCHIVAL_STRATEGY, ARCH_MINIMUM_AGE_MONTHS, IS_WORKFLOW_SUCCESS_REQUIRED,
+--   WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_TOTAL_SIZE
+--   Column names: SIZE (not TOTAL_SIZE), OVER_ARCH_THRESOLD_SIZE (not OVER_ARCH_THRESOLD_TOTAL_SIZE)
+-- ====================================================================
+
+CREATE TABLE CT_MRDS.A_TABLE_STAT (
+    A_TABLE_STAT_KEY                  NUMBER(38,0) PRIMARY KEY,
+    A_SOURCE_FILE_CONFIG_KEY          NUMBER(38,0) NOT NULL,
+    TABLE_NAME                        VARCHAR2(200) NOT NULL,
+    CREATED                           TIMESTAMP(6) DEFAULT SYSTIMESTAMP,
+    ARCH_THRESHOLD_DAYS               NUMBER(4,0),
+    FILE_COUNT                        NUMBER(38,0),
+    ROW_COUNT                         NUMBER(38,0),
+    "SIZE"                            NUMBER(38,0),
+    OVER_ARCH_THRESOLD_FILE_COUNT     NUMBER(38,0),
+    OVER_ARCH_THRESOLD_ROW_COUNT      NUMBER(38,0),
+    OVER_ARCH_THRESOLD_SIZE           NUMBER(38,0),
+    CONSTRAINT A_TABLE_STAT_UK1 UNIQUE(A_SOURCE_FILE_CONFIG_KEY)
+) TABLESPACE "DATA";
+
+-- Note: A_TABLE_STAT_UK1 index is auto-created by the UNIQUE constraint definition above.
diff --git a/MARS_Packages/REL02_POST/MARS-1409/rollback_version/A_TABLE_STAT_HIST.sql b/MARS_Packages/REL02_POST/MARS-1409/rollback_version/A_TABLE_STAT_HIST.sql
new file mode 100644
index 0000000..d406001
--- /dev/null
+++ b/MARS_Packages/REL02_POST/MARS-1409/rollback_version/A_TABLE_STAT_HIST.sql
@@ -0,0 +1,23 @@
+-- ====================================================================
+-- A_TABLE_STAT_HIST Table (rollback_version - pre MARS-1409)
+-- ====================================================================
+-- Purpose: Store historical table statistics for trend analysis
+-- NOTE: This is the pre-MARS-1409 structure without:
+--   ARCHIVAL_STRATEGY, ARCH_MINIMUM_AGE_MONTHS, IS_WORKFLOW_SUCCESS_REQUIRED,
+--   WORKFLOW_SUCCESS_FILE_COUNT, WORKFLOW_SUCCESS_ROW_COUNT, WORKFLOW_SUCCESS_TOTAL_SIZE
+--   Column names: SIZE (not TOTAL_SIZE), OVER_ARCH_THRESOLD_SIZE (not OVER_ARCH_THRESOLD_TOTAL_SIZE)
+-- ====================================================================
+
+CREATE TABLE CT_MRDS.A_TABLE_STAT_HIST (
+    A_TABLE_STAT_HIST_KEY             NUMBER(38,0) PRIMARY KEY,
+    A_SOURCE_FILE_CONFIG_KEY          NUMBER(38,0) NOT NULL,
+    TABLE_NAME                        VARCHAR2(200) NOT NULL,
+    CREATED                           TIMESTAMP(6) DEFAULT SYSTIMESTAMP,
+    ARCH_THRESHOLD_DAYS               NUMBER(4,0),
+    FILE_COUNT                        NUMBER(38,0),
+    ROW_COUNT                         NUMBER(38,0),
+    "SIZE"                            NUMBER(38,0),
+    OVER_ARCH_THRESOLD_FILE_COUNT     NUMBER(38,0),
+    OVER_ARCH_THRESOLD_ROW_COUNT      NUMBER(38,0),
+    OVER_ARCH_THRESOLD_SIZE           NUMBER(38,0)
+) TABLESPACE "DATA";