Помогите Unable to save chunks

Помогите, при запуске сервера консоль засоряется однотипными сообщениями и сервер не запускается.
Ядро Spigot 1.16.1
Пример:

[22:02:17] [Thread-2/ERROR]: Failed to save chunk -6,-7

java.util.ConcurrentModificationException: null

at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1208) ~[?:?]

at java.util.TreeMap$KeyIterator.next(TreeMap.java:1262) ~[?:?]

at net.minecraft.server.v1_16_R1.TickListServer.a(TickListServer.java:132) ~[minecraft_server.jar:git-Spigot-0287a20-7560f5f]

at net.minecraft.server.v1_16_R1.TickListServer.a(TickListServer.java:113) ~[minecraft_server.jar:git-Spigot-0287a20-7560f5f]

at net.minecraft.server.v1_16_R1.TickListServer.a(TickListServer.java:109) ~[minecraft_server.jar:git-Spigot-0287a20-7560f5f]

at net.minecraft.server.v1_16_R1.TickListServer.a(TickListServer.java:169) ~[minecraft_server.jar:git-Spigot-0287a20-7560f5f]

at net.minecraft.server.v1_16_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:350) ~[minecraft_server.jar:git-Spigot-0287a20-7560f5f]

at net.minecraft.server.v1_16_R1.PlayerChunkMap.saveChunk(PlayerChunkMap.java:722) ~[minecraft_server.jar:git-Spigot-0287a20-7560f5f]

at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:176) [?:?]

at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) [?:?]

at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195) [?:?]

at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1492) [?:?]

at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) [?:?]

at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) [?:?]

at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) [?:?]

at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) [?:?]

at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) [?:?]

at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) [?:?]

at net.minecraft.server.v1_16_R1.PlayerChunkMap.save(PlayerChunkMap.java:320) [minecraft_server.jar:git-Spigot-0287a20-7560f5f]

at net.minecraft.server.v1_16_R1.ChunkProviderServer.save(ChunkProviderServer.java:309) [minecraft_server.jar:git-Spigot-0287a20-7560f5f]

at net.minecraft.server.v1_16_R1.WorldServer.save(WorldServer.java:760) [minecraft_server.jar:git-Spigot-0287a20-7560f5f]

at net.minecraft.server.v1_16_R1.MinecraftServer.saveChunks(MinecraftServer.java:676) [minecraft_server.jar:git-Spigot-0287a20-7560f5f]

at net.minecraft.server.v1_16_R1.MinecraftServer.stop(MinecraftServer.java:743) [minecraft_server.jar:git-Spigot-0287a20-7560f5f]

at net.minecraft.server.v1_16_R1.DedicatedServer.stop(DedicatedServer.java:644) [minecraft_server.jar:git-Spigot-0287a20-7560f5f]

at net.minecraft.server.v1_16_R1.MinecraftServer.close(MinecraftServer.java:694) [minecraft_server.jar:git-Spigot-0287a20-7560f5f]

at org.bukkit.craftbukkit.v1_16_R1.util.ServerShutdownThread.run(ServerShutdownThread.java:16) [minecraft_server.jar:git-Spigot-0287a20-7560f5f]

 

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