Well it's me again, all the problems I had in other servers were solved and I didn't have problems for a long time until now
So i wanted to open the server,but then my friends tried to enter and they couldnt,so i checked the config and.... The config reseted,then i checked worlds and i found that a new world was created for some reason.
The thing is i dont know why this happened,I had installed one or two mods and updated one, when I opened the server a few days ago with the new mods everything was fine, but now when I try to open this happens
PD:The most recent backup is from August so this is other problem