Database Schema Fix:
- Fixed unique constraint to allow multiple accounts per CA-3 line
- Changed from (entity, ca3_line) to (entity, ca3_line, account_code)
- Added migration script to update existing tables
- Updated table comments to reflect new CA-3 line structure
Debug Features Added:
- Database operation logging in updateAccountMapping method
- Table existence and structure checking in setup page
- Detailed error logging for SQL operations
- Form data processing visibility
The issue was likely the unique constraint preventing multiple accounts per line!
