first there was a crash when opened the Tinkers crafting table, and now the server crashes randomly when using waystone
I'm bad with english, sorry for using translator

this is crash reports

Description: Exception ticking world

java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1469)
at java.util.HashMap$KeyIterator.next(HashMap.java:1493)
at net.minecraft.entity.EntityTracker.sendLeashedEntitiesInChunk(EntityTracker.java:386)
at.net.minecraft.server.management.PlayerChunkMapEntry.sendToPlayers(PlayerChunkMapEntry.java:162)
at.net.minecraft.server.management.PlayerChunkMap.tick(SourceFile:165)
at.net.minecraft.world.WorldServer.tick(WorldServer.java:227)
at.net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:756)
at.net.minecraft.server.dedicated.DedicatedServer.updateTimeLightAndEntities(DedicatedServer.java:397)
at.net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:668)
at.net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
at java.lang.Thread.run(Thread.java:748)

Could you send the full crash report?

crash-2022-07-23_22.33.47-server.txt