Server Crashing - Caused by Tiny Allies

[M0diis]

Crash report:

	Time: 2025-09-29 09:20:05
	Description: Feature placement
	 
	java.util.ConcurrentModificationException: Async entity load
		at net.minecraft.class_3898.handler$bjg000$c2me-fixes-general-threading-issues$preventAsyncEntityLoad(class_3898.java:11476)
		at net.minecraft.class_3898.method_18701(class_3898.java)

https://m0dii-dev.xyz/paste/2972a6a9

Mod Version:
repurposed_structures-7.1.14+1.20.1-fabric.jar

[TelepathicGrunt]

java.util.ConcurrentModificationException: Async entity load
	at net.minecraft.server.world.ThreadedAnvilChunkStorage.handler$bjg000$c2me-fixes-general-threading-issues$preventAsyncEntityLoad(ThreadedAnvilChunkStorage.java:11476)
	at net.minecraft.server.world.ThreadedAnvilChunkStorage.loadEntity(ThreadedAnvilChunkStorage.java)
	at net.minecraft.server.world.ServerChunkManager.loadEntity(ServerChunkManager.java:484)
	at net.minecraft.server.world.ServerWorld$class_5526.startTracking(ServerWorld.java:1558)
	at net.minecraft.server.world.ServerWorld$class_5526.startTracking(ServerWorld.java:1536)
	at net.minecraft.server.world.ServerEntityManager.startTracking(ServerEntityManager.java:216)
	at net.minecraft.server.world.ServerEntityManager.addEntity(ServerEntityManager.java:186)
	at net.minecraft.server.world.ServerEntityManager.addEntity(ServerEntityManager.java:167)
	at net.minecraft.ServerWorld.addEntity(ServerWorld.java:911)
	at net.minecraft.ServerWorld.spawnEntity(ServerWorld.java:862)
	at net.minecraft.entity.mob.MobEntity.convertTo(MobEntity.java:1268)
	at net.tinyallies.util.ModUtil.babifyMob(ModUtil.java:35)
	at net.minecraft.entity.mob.SkeletonEntity.initialize(SkeletonEntity.java:1536)
	at com.telepathicgrunt.repurposedstructures.world.features.Skeletons.generate(Skeletons.java:28)

Looks like Tiny Allies may be the cause by using convertTo method during worldgen entity spawning. Repurposed Structures spawns entities during worldgen the same way vanilla does when spawning structures with entities. So it’s likely you would see this same issue even without repurposed structures when spawning structures with entities in them

[M0diis]

That makes sense. I will try to remove Tiny Allies and see if the issue occurs again. Thanks.

[TelepathicGrunt]

[TelepathicGrunt]

[M0diis]

I totally forgot to mention, removing it fixed the issue, but I think you already know that haha.
But yeah, thanks.