Help with server crashing

Hello there, i created a modded server to play with a couple of friends, and it worked well for a couple of days. It was until recently, that the server started crashing and I am unable to find out the cause of it. Any help would be greatly appreciated. Thanks in advance.

log: https://mclo.gs/iJ0DaKv

crash report: https://mclo.gs/6aEwymt

Oh okay, since I've used it for worldgen, doubt i can fix it other that generating a new world. Well, glad to know the issue, thanks for the help ! Have a good day !