Error: ConcurrentModificationException in MobRemovalTimerTask

[Shidapu]

What steps will reproduce the problem?

Updated to latest Towny.

What is the expected output?

I have no idea.

Towny version

0.98.2.0

Server version

Paper 1.18.2

Please use Pastebin.com to link the following files

1. https://gcloud.gmz.cx/s/mz6J8MreX984b9q
2. https://gcloud.gmz.cx/s/A74Jk7fkAwLjpKX
3. https://gcloud.gmz.cx/s/7LC96dSd4KFxYLE
4. Your log's error:

[19:35:29 WARN]: [Towny] Task #4789 for Towny v0.98.2.0 generated an exception
java.util.ConcurrentModificationException: null
        at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1013) ~[?:?]
        at java.util.ArrayList$Itr.next(ArrayList.java:967) ~[?:?]
        at com.palmergames.bukkit.towny.tasks.MobRemovalTimerTask.lambda$run$0(MobRemovalTimerTask.java:128) ~[Towny-0.98.2.0.jar:?]
        at org.bukkit.craftbukkit.v1_18_R2.scheduler.CraftTask.run(CraftTask.java:101) ~[paper-1.18.2.jar:git-Paper-347]
        at org.bukkit.craftbukkit.v1_18_R2.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:483) ~[paper-1.18.2.jar:git-Paper-347]
        at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1531) ~[paper-1.18.2.jar:git-Paper-347]
        at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:483) ~[paper-1.18.2.jar:git-Paper-347]
        at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1455) ~[paper-1.18.2.jar:git-Paper-347]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1225) ~[paper-1.18.2.jar:git-Paper-347]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:315) ~[paper-1.18.2.jar:git-Paper-347]
        at java.lang.Thread.run(Thread.java:833) ~[?:?]

6. https://gcloud.gmz.cx/s/teSBbxz7Nbs4gRW
7. https://gcloud.gmz.cx/s/oatopLSn3e2sEH4