Помогите Крашит Сервер на 1.12.2 Paper

---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 1/27/21 10:27 AM
Description: Exception ticking world

java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445)
at java.util.HashMap$KeyIterator.next(HashMap.java:1469)
at net.minecraft.server.v1_12_R1.PlayerChunkMap.flush(PlayerChunkMap.java:122)
at net.minecraft.server.v1_12_R1.WorldServer.doTick(WorldServer.java:320)
at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:801)
at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406)
at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679)
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577)
at java.lang.Thread.run(Thread.java:748)

 

Нету пишешь