diff --git a/build.sh b/build.sh
index 1cd13c9..787d2d5 100755
--- a/build.sh
+++ b/build.sh
@@ -77,17 +77,26 @@ for module in rbac customer_management opportunity_management contract_managemen
     MOD_DIR="$PKGS_DIR/$module"
     if [ -d "$MOD_DIR/models" ]; then
         cd "$MOD_DIR/models"
+        # Generate DDL to a temp file, filter out exception/error lines
+        TEMP_DDL=$(mktemp)
         if ls *.xlsx >/dev/null 2>&1; then
-            xls2ddl mysql . > "$MOD_DIR/mysql.ddl.sql" 2>/dev/null || true
+            xls2ddl mysql . > "$TEMP_DDL" 2>/dev/null || true
         elif ls *.json >/dev/null 2>&1; then
-            json2ddl mysql . > "$MOD_DIR/mysql.ddl.sql" 2>/dev/null || true
+            json2ddl mysql . > "$TEMP_DDL" 2>/dev/null || true
         fi
-        if [ -f "$MOD_DIR/mysql.ddl.sql" ] && [ -s "$MOD_DIR/mysql.ddl.sql" ]; then
-            echo "-- Module: $module" >> "$APP_DIR/integrated_crm_app_schema.sql"
-            cat "$MOD_DIR/mysql.ddl.sql" >> "$APP_DIR/integrated_crm_app_schema.sql"
-            echo "" >> "$APP_DIR/integrated_crm_app_schema.sql"
-            echo "    Generated DDL for $module"
+        # Filter: only keep lines that look like valid SQL (CREATE TABLE, CREATE INDEX, comments, blank lines, semicolons)
+        if [ -f "$TEMP_DDL" ] && [ -s "$TEMP_DDL" ]; then
+            grep -v "^Exception:" "$TEMP_DDL" > "$MOD_DIR/mysql.ddl.sql" 2>/dev/null || true
+            if [ -s "$MOD_DIR/mysql.ddl.sql" ]; then
+                echo "-- Module: $module" >> "$APP_DIR/integrated_crm_app_schema.sql"
+                cat "$MOD_DIR/mysql.ddl.sql" >> "$APP_DIR/integrated_crm_app_schema.sql"
+                echo "" >> "$APP_DIR/integrated_crm_app_schema.sql"
+                echo "    Generated DDL for $module"
+            else
+                echo "    WARNING: No valid DDL generated for $module"
+            fi
         fi
+        rm -f "$TEMP_DDL"
     fi
 done
 cd "$APP_DIR"