Heya guys! I'm having an issue on my minecraft server and I'm hoping someone can point me in the right direction. Thanks!

Mods: Biomes O Plenty, Citadel, Dynamic Trees, Dynmap, Ice&Fire, Zaeros minimap
Notes: While I have Plenty O biomes installed, I installed it after spawning into the world. When players try to go into a new area, the game thinks we are out of bounds and crashes.

However, when I load the server this is the error I get:
[18:41:56] [main/INFO] [ne.mi.re.GameData/]: Potentially Dangerous alternative prefix citadel for name debug, expected minecraft. This could be a intended override, but in most cases indicates a broken mod.
[18:41:56] [main/INFO] [ne.mi.re.GameData/]: Potentially Dangerous alternative prefix citadel for name citadel_book, expected minecraft. This could be a intended override, but in most cases indicates a broken mod.
[18:41:56] [main/INFO] [ne.mi.re.GameData/]: Potentially Dangerous alternative prefix citadel for name effect_item, expected minecraft. This could be a intended override, but in most cases indicates a broken mod.
[18:41:56] [main/INFO] [ne.mi.re.GameData/]: Potentially Dangerous alternative prefix citadel for name fancy_item, expected minecraft. This could be a intended override, but in most cases indicates a broken mod.

When I crash this is some info I get:
[17:40:08] [Worker-Main-514/FATAL] [ne.mi.co.ForgeMod/]: Preparing crash report with UUID adfaac15-6f19-43c6-b67b-1059951cef1e
[17:40:08] [Worker-Main-514/WARN] [minecraft/Util]: Worker-Main-514 died

Here is the whole crash report:
https://drive.google.com/file/d/1TEUQQpYaKu56RNUea-ZD2FhRLiyeJkGP/view?usp=sharing