Fix: For private servers, just log in to the server, put in admin password and change the setting on the crafting tab to disable thrall decay. Then log off, shut down the server and replace game.db with one of the backups from before you updated the game. Hopefully you make a backup before every update like I do. Then start the server again and boom everyone is back as they were.

The default is 15 days so I’d like me you haven’t played for a while then it immediately deletes them.