Sanctum instance bug

Hello, when i try to enter my sanctum instance i got kicked to menu and it says: "The terrain generator for the client is out of sync with the server. Please create a new instance. " Even when i create new instance in trial of sakhema it happens again nad again, i won't completely delete my sanctum run because im near last boss with expensive unique relic. Please tell me what should i do now with it.

+1