Well, the server started crashing randomly.
We're investigating the problem. Before we find out what's the cause of it, the server might crash again.
I changed the time of world save to 5 minutes so.. maximum possible rollback should not be longer than that.
If you worry about rollback, lost special encounters or other stuff, then you should wait until it's fixed.
Warning: if you planned to do reroll, please postpone it until the issue is fixed. In case of "bad shit happens", it will be necessary to bring back your deleted character from backup and I'd like to avoid it for now.