Server keeps crashing and I don't know why

log: https://mclo.gs/fZlokZQ

I haven't seen anyone else with a log like mine asking for help so I thought I'd ask here. I only see one warning but I don't understand what it wants me to do. I can't delete the mod since it's necessary for another mod. I also find the fact that all the coremods seem to be missing kind of suspicious, but I'm not sure what to do about it. Thanks in advance for any help.

I tried to start the server again and got the exact same log it seems. The server will try to start for 5 seconds then immediately start shutting itself down and showing the crashed icon.

log: https://mclo.gs/GwaRW8I

I can't remove forgelin because it's required for another mod though I did delete it before just to see if it'd work and it did not.

I just deleted some mods and now the log is saying I didn't have the right versions of forge but the versions of forge required are all different and some aren't even available to download..

I no longer need help I just downloaded a previous verison of forge.