Bumblezone crashing server current when people try to go in a certain area of it.

[25.02 00:45:45] [Server] [Server thread/ERROR]: Error executing task on Chunk source main thread executor for the_bumblezone:the_bumblezone
[25.02 00:45:45] [Server] net.minecraft.class_Feature placement
[25.02 00:45:45] [Server] at net.minecraft.class_3898.method_39934(class_3898.java:693) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_1255.method_18859(class_1255.java:157) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3215$class_4212.method_18859(class_3215.java:557) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_1255.method_16075(class_1255.java:131) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3215$class_4212.method_16075(class_3215.java:566) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3215.method_19492(class_3215.java:279) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.server.MinecraftServer.method_20415(MinecraftServer.java:764) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.server.MinecraftServer.method_16075(MinecraftServer.java:752) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_1255.method_18857(class_1255.java:140) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.server.MinecraftServer.method_16208(MinecraftServer.java:737) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:669) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:257) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at java.lang.Thread.run(Thread.java:833) [?:?]
[25.02 00:45:45] [Server] Caused byjava.util.ConcurrentModificationException: ThreadLocalRandom accessed from a different thread (owner: Thread[Server thread,8,main], current: Thread[Worker-Main-1,5,main])
[25.02 00:45:45] [Server] at com.ishland.uwrad.common.CheckedThreadLocalRandom.method_43156(CheckedThreadLocalRandom.java:32) ~[unsafe-world-random-access-detector-1.0.0.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_6566.method_43048(class_6566.java:33) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at party.lemons.biomemakeover.entity.MothEntity$MoveToLightGoal.(MothEntity.java:296) ~[biomemakeover-FABRIC-1.19.2-1.6.2.jar:?]
[25.02 00:45:45] [Server] at party.lemons.biomemakeover.entity.MothEntity.method_5959(MothEntity.java:74) ~[biomemakeover-FABRIC-1.19.2-1.6.2.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_1308.(class_1308.java:150) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_1314.(class_1314.java:14) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_1588.(class_1588.java:31) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at party.lemons.biomemakeover.entity.MothEntity.(MothEntity.java:61) ~[biomemakeover-FABRIC-1.19.2-1.6.2.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_1299.method_5883(class_1299.java:487) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at com.telepathicgrunt.the_bumblezone.world.features.HangingGardenMob.method_13151(HangingGardenMob.java:42) ~[the_bumblezone_fabric-6.6.7+1.19.2.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3031.method_40163(class_3031.java:165) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_2975.method_12862(class_2975.java:27) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_6796.method_39646(class_6796.java:56) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) ~[?:?]
[25.02 00:45:45] [Server] at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?]
[25.02 00:45:45] [Server] at net.minecraft.class_6796.method_39648(class_6796.java:55) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_6796.method_39644(class_6796.java:40) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3776.method_16626(class_3776.java:75) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3790.method_27236(class_3790.java:89) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3790.method_14931(class_3790.java:85) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3449.method_14974(class_3449.java:99) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_2794.method_38265(class_2794.java:429) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at com.google.common.collect.ImmutableList.forEach(ImmutableList.java:422) ~[guava-31.0.1-jre.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_2794.method_12102(class_2794.java:428) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_2806.method_20613(class_2806.java:145) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_2806.method_12154(class_2806.java:292) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3898.method_17225(class_3898.java:679) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3898.method_17224(class_3898.java:673) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1150) ~[?:?]
[25.02 00:45:45] [Server] at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482) ~[?:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3900.method_17634(class_3900.java:62) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3846.method_16907(class_3846.java:91) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3846.method_16900(class_3846.java:146) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3846.run(class_3846.java:102) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1395) ~[?:?]
[25.02 00:45:45] [Server] at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373) ~[?:?]
[25.02 00:45:45] [Server] at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182) ~[?:?]
[25.02 00:45:45] [Server] at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655) ~[?:?]
[25.02 00:45:45] [Server] at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622) ~[?:?]
[25.02 00:45:45] [Server] at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165) ~[?:?]
[25.02 00:45:45] [Server] [Server thread/ERROR]: Encountered an unexpected exception
[25.02 00:45:45] [Server] net.minecraft.class_Feature placement
[25.02 00:45:45] [Server] at net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:879) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3176.method_3813(class_3176.java:289) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:819) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:665) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:257) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at java.lang.Thread.run(Thread.java:833) [?:?]
[25.02 00:45:45] [Server] Caused byjava.util.ConcurrentModificationException: ThreadLocalRandom accessed from a different thread (owner: Thread[Server thread,8,main], current: Thread[Worker-Main-1,5,main])
[25.02 00:45:45] [Server] at com.ishland.uwrad.common.CheckedThreadLocalRandom.method_43156(CheckedThreadLocalRandom.java:32) ~[unsafe-world-random-access-detector-1.0.0.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_6566.method_43048(class_6566.java:33) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at party.lemons.biomemakeover.entity.MothEntity$MoveToLightGoal.(MothEntity.java:296) ~[biomemakeover-FABRIC-1.19.2-1.6.2.jar:?]
[25.02 00:45:45] [Server] at party.lemons.biomemakeover.entity.MothEntity.method_5959(MothEntity.java:74) ~[biomemakeover-FABRIC-1.19.2-1.6.2.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_1308.(class_1308.java:150) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_1314.(class_1314.java:14) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_1588.(class_1588.java:31) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at party.lemons.biomemakeover.entity.MothEntity.(MothEntity.java:61) ~[biomemakeover-FABRIC-1.19.2-1.6.2.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_1299.method_5883(class_1299.java:487) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at com.telepathicgrunt.the_bumblezone.world.features.HangingGardenMob.method_13151(HangingGardenMob.java:42) ~[the_bumblezone_fabric-6.6.7+1.19.2.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3031.method_40163(class_3031.java:165) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_2975.method_12862(class_2975.java:27) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_6796.method_39646(class_6796.java:56) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:411) ~[?:?]
[25.02 00:45:45] [Server] at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) ~[?:?]
[25.02 00:45:45] [Server] at net.minecraft.class_6796.method_39648(class_6796.java:55) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_6796.method_39644(class_6796.java:40) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3776.method_16626(class_3776.java:75) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3790.method_27236(class_3790.java:89) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3790.method_14931(class_3790.java:85) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3449.method_14974(class_3449.java:99) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_2794.method_38265(class_2794.java:429) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at com.google.common.collect.ImmutableList.forEach(ImmutableList.java:422) ~[guava-31.0.1-jre.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_2794.method_12102(class_2794.java:428) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_2806.method_20613(class_2806.java:145) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_2806.method_12154(class_2806.java:292) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3898.method_17225(class_3898.java:679) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-5.0.28.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3898.method_17224(class_3898.java:673) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1150) ~[?:?]
[25.02 00:45:45] [Server] at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:482) ~[?:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3900.method_17634(class_3900.java:62) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3846.method_16907(class_3846.java:91) ~[server-intermediary.jar:?]
[25.02 00:45:45] [Server] at net.minecraft.class_3846.method_16900(class_3846.java:146) ~[server-intermediary.jar:?]

This is a duplicate of this issue report since Better Minecraft still has not updated their modpack: #210

Here's the explanation for what the issue actually is: #210 (comment)

Either update Bumblezone where I removed the Biome Makeover Moth from the entity tag I use for spawning mobs in Hanging Gardens structures. Or use the datapack in the link above if you cannot update Bumblezone

This was with the medievalmc pack. Thanks for the response!

It's still the same issue as the Lunar Studio team includes Bumblezone, Biome Makeover, and C2ME in both Better Minecraft and Medieval MC but still have not yet updated to fix the crash. Forcing users to do the workarounds themselves.

The line from your log that shows the source of the issue:

Gotcha! Used the fix described above! Didn't know if it would make a difference or not.