[00:53:07] [Server thread/ERROR] [Sponge]: The Scheduler tried to run the task legendarygenerator-S-11 owned by Plugin{id=legendarygenerator, name=LegendaryGenerator, version=3.1.2-Reforged, description=Plugin to spawn a random legendary on the player based on biomes, authors=[Lypaka], source=./mods/LegendaryGenerator-3.1.2-Reforged.jar}, but an error occured.
java.util.ConcurrentModificationException: null
	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445) ~[?:1.8.0_275]
	at java.util.HashMap$EntryIterator.next(HashMap.java:1479) ~[?:1.8.0_275]
	at java.util.HashMap$EntryIterator.next(HashMap.java:1477) ~[?:1.8.0_275]
	at com.lypaka.legendarygenerator.Utils.DespawnCheckerTask.lambda$checkForDespawns$0(DespawnCheckerTask.java:64) ~[DespawnCheckerTask.class:?]
	at org.spongepowered.common.scheduler.SchedulerBase.lambda$startTask$0(SchedulerBase.java:197) ~[SchedulerBase.class:1.12.2-2838-7.3.0]
	at org.spongepowered.common.scheduler.SyncScheduler.executeTaskRunnable(SyncScheduler.java:74) ~[SyncScheduler.class:1.12.2-2838-7.3.0]
	at org.spongepowered.common.scheduler.SchedulerBase.startTask(SchedulerBase.java:188) ~[SchedulerBase.class:1.12.2-2838-7.3.0]
	at org.spongepowered.common.scheduler.SchedulerBase.processTask(SchedulerBase.java:174) ~[SchedulerBase.class:1.12.2-2838-7.3.0]
	at java.util.concurrent.ConcurrentHashMap$ValuesView.forEach(ConcurrentHashMap.java:4707) [?:1.8.0_275]
	at org.spongepowered.common.scheduler.SchedulerBase.runTick(SchedulerBase.java:112) [SchedulerBase.class:1.12.2-2838-7.3.0]
	at org.spongepowered.common.scheduler.SyncScheduler.tick(SyncScheduler.java:47) [SyncScheduler.class:1.12.2-2838-7.3.0]
	at org.spongepowered.common.scheduler.SpongeScheduler.tickSyncScheduler(SpongeScheduler.java:189) [SpongeScheduler.class:1.12.2-2838-7.3.0]
	at org.spongepowered.mod.SpongeMod.onTick(SpongeMod.java:441) [SpongeMod.class:1.12.2-2838-7.3.0]
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_32_SpongeMod_onTick_ServerTickEvent.invoke(.dynamic) [?:?]
	at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90) [ASMEventHandler.class:?]
	at net.minecraftforge.fml.common.eventhandler.EventBus.forgeBridge$post(EventBus.java:756) [EventBus.class:?]
	at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:706) [EventBus.class:?]
	at net.minecraftforge.fml.common.FMLCommonHandler.onPreServerTick(FMLCommonHandler.java:279) [FMLCommonHandler.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:657) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_275]