[10:23:52] [Craft Scheduler Thread - 6576/WARN]: [IridiumSkyblock] Plugin IridiumSkyblock v2.2.7 generated an exception while executing task 2248
java.util.ConcurrentModificationException: null
	at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_241]
	at java.util.ArrayList$Itr.next(Unknown Source) ~[?:1.8.0_241]
	at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:96) ~[patched_1.13.2.jar:git-Paper-655]
	at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:61) ~[patched_1.13.2.jar:git-Paper-655]
	at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[patched_1.13.2.jar:git-Paper-655]
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:125) ~[patched_1.13.2.jar:git-Paper-655]
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:243) ~[patched_1.13.2.jar:git-Paper-655]
	at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[patched_1.13.2.jar:git-Paper-655]
	at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(MapTypeAdapterFactory.java:239) ~[patched_1.13.2.jar:git-Paper-655]
	at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(MapTypeAdapterFactory.java:145) ~[patched_1.13.2.jar:git-Paper-655]
	at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[patched_1.13.2.jar:git-Paper-655]
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:125) ~[patched_1.13.2.jar:git-Paper-655]
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:243) ~[patched_1.13.2.jar:git-Paper-655]
	at com.google.gson.Gson.toJson(Gson.java:669) ~[patched_1.13.2.jar:git-Paper-655]
	at com.google.gson.Gson.toJson(Gson.java:648) ~[patched_1.13.2.jar:git-Paper-655]
	at com.google.gson.Gson.toJson(Gson.java:603) ~[patched_1.13.2.jar:git-Paper-655]
	at com.google.gson.Gson.toJson(Gson.java:583) ~[patched_1.13.2.jar:git-Paper-655]
	at com.iridium.iridiumskyblock.serializer.Persist.save(Persist.java:81) ~[?:?]
	at com.iridium.iridiumskyblock.IridiumSkyblock.saveIslandManager(IridiumSkyblock.java:204) ~[?:?]
	at org.bukkit.craftbukkit.v1_13_R2.scheduler.CraftTask.run(CraftTask.java:84) ~[patched_1.13.2.jar:git-Paper-655]
	at org.bukkit.craftbukkit.v1_13_R2.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) ~[patched_1.13.2.jar:git-Paper-655]
	at com.destroystokyo.paper.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:22) ~[patched_1.13.2.jar:git-Paper-655]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_241]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_241]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_241]