Classic XI database issues still persist after World Cup update

This issue appears to be part of the same long-running database problem that began with the Classic XI/Edit Teams bugs and is still affecting the game after the latest World Cup update.

For many months, players have reported duplicate player entries, broken squad editing, players remaining attached to teams after transfers, and other database-related issues within Edit Teams. Despite numerous reports, these problems continue to appear in new forms after roster updates.

Following the World Cup update, some players now appear to be incorrectly linked to national team databases. Attempting to move, remove, or edit these players can result in duplicate entries, duplicate squad numbers, or players remaining in places where they should no longer exist.

The core problem is not a single player or team. The problem is that the database itself appears to become corrupted when certain players are edited. This creates duplicates and inconsistent player records that can then be carried into Career Mode saves.

For Career Mode users, this is a major issue because Edit Teams is often used to create custom databases before starting a long-term save. Once duplicate players or broken records are introduced, the entire save can be affected.
This appears to be the same family of issues that started with the Classic XI/Edit Teams bugs and has never been fully resolved. The latest World Cup update seems to have introduced additional cases of the same underlying database problem.Can the team please investigate the underlying database and player-linking system rather than treating these as isolated player-specific reports? Multiple community threads have documented similar symptoms for months, and the issue continues to reappear after updates.

Multiple threads continue to get completely ignored, or simply labeled as “needs more info”, although enough information to recreate this bug has already been posted for months.