[Bug]: ConcurrentModificationException

[LynxN1]

Bug Description

This error is crashing the server. In addition to Heracles, the server also has Argonauts and Handcrafted.

How to Reproduce?

No response

Expected Behavior

No response

Version

1.1.13

Mod Loader Version

1.20.1 - 0.16.5

Mod Loader

Fabric

Logs or additional context

[23:05:30] [Server thread/ERROR]: Encountered an unexpected exception
net.minecraft.class_148: Ticking entity
	at net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:901) ~[server-intermediary.jar:?]
	at net.minecraft.class_3176.method_3813(class_3176.java:283) ~[server-intermediary.jar:?]
	at net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:824) ~[server-intermediary.jar:?]
	at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:671) ~[server-intermediary.jar:?]
	at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:265) ~[server-intermediary.jar:?]
	at java.lang.Thread.run(Thread.java:840) ~[?:?]
Caused by: java.util.ConcurrentModificationException
	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1013) ~[?:?]
	at java.util.ArrayList$Itr.next(ArrayList.java:967) ~[?:?]
	at earth.terrarium.heracles.common.handlers.progress.QuestsProgress.testAndProgressTaskType(QuestsProgress.java:32) ~[Heracles-fabric-1.20.1-1.1.13.jar:?]
	at earth.terrarium.heracles.fabric.HeraclesFabric.lambda$init$1(HeraclesFabric.java:34) ~[Heracles-fabric-1.20.1-1.1.13.jar:?]
	at net.fabricmc.fabric.api.entity.event.v1.ServerEntityCombatEvents.lambda$static$0(ServerEntityCombatEvents.java:37) ~[fabric-entity-events-v1-1.6.0+1c78457f77-e3c453032de852de.jar:?]
	at net.minecraft.class_1309.wrapOperation$ckk000$fabric-entity-events-v1$onEntityKilledOther(class_1309.java:29178) ~[server-intermediary.jar:?]
	at net.minecraft.class_1309.method_6078(class_1309.java:1364) ~[server-intermediary.jar:?]
	at net.minecraft.class_1308.method_6078(class_1308.java:6154) ~[server-intermediary.jar:?]
	at net.minecraft.class_1309.method_5643(class_1309.java:1222) ~[server-intermediary.jar:?]
	at net.minecraft.class_1665.mixinextras$bridge$method_5643$86(class_1665.java) ~[server-intermediary.jar:?]
	at net.minecraft.class_1665.wrapOperation$gfc000$spell_engine$wrapDamageEntity(class_1665.java:5899) ~[server-intermediary.jar:?]
	at net.minecraft.class_1665.method_7454(class_1665.java:374) ~[server-intermediary.jar:?]
	at net.minecraft.class_1676.method_7488(class_1676.java:153) ~[server-intermediary.jar:?]
	at net.minecraft.class_1665.method_5773(class_1665.java:227) ~[server-intermediary.jar:?]
	at net.minecraft.class_1679.method_5773(class_1679.java:31) ~[server-intermediary.jar:?]
	at net.minecraft.class_3218.method_18762(class_3218.java:739) ~[server-intermediary.jar:?]
	at net.minecraft.class_1937.method_18472(class_1937.java:480) ~[server-intermediary.jar:?]
	at net.minecraft.class_3218.method_31420(class_3218.java:385) ~[server-intermediary.jar:?]
	at net.minecraft.class_5574.method_31791(class_5574.java:54) ~[server-intermediary.jar:?]
	at net.minecraft.class_3218.method_18765(class_3218.java:353) ~[server-intermediary.jar:?]
	at net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:897) ~[server-intermediary.jar:?]
	... 5 more

Code of Conduct

• I have searched the issue tracker and confirmed that the issue has not been reported
• I have checked the FAQ (if one is present) and my issue is not listed
• I have verified that I am using the latest version of the mod
• I have verified that I have installed all the required dependencies for the mod
• I have verified that I do not have Optifine installed. We will close issues if we detect Optifine is in your pack. We cannot fix Optifine issues. Please do not report issues with Optifine present.

[ThatGravyBoat]

You have a mod that is executing something off thread it seems

[ledokua]

You have a mod that is executing something off thread it seems

Sorry, but what you mean by that?

[SettingDust]

You have to find out the replicate

[ledokua]

Ok.
This happens sometimes when player have quest to kill mob and uses arrow to do this(any arrow)

[SettingDust]

Providing the mods. Minimal reproduce best.