All player crash on kill ! lastest build

[piloubry]

---- Minecraft Crash Report ----

WARNING: coremods are present:
CustomSkinLoader (CustomSkinLoader_Forge-14.10a.jar)
ObfuscatePlugin (obsucate.jar)
Contact their authors BEFORE contacting forge

// I let you down. Sorry :(

Time: 3/11/19 2:48 PM
Description: Unexpected error

java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
at java.util.ArrayList$Itr.next(Unknown Source)
at com.flansmod.client.ClientRenderHooks.update(ClientRenderHooks.java:331)
at com.flansmod.client.handlers.ClientEventHandler.clientTick(ClientEventHandler.java:77)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_125_ClientEventHandler_clientTick_ClientTickEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
at net.minecraftforge.fml.common.FMLCommonHandler.onPostClientTick(FMLCommonHandler.java:349)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1910)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1097)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:397)
at net.minecraft.client.main.Main.main(SourceFile:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Client thread
Stacktrace:
at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
at java.util.ArrayList$Itr.next(Unknown Source)
at com.flansmod.client.ClientRenderHooks.update(ClientRenderHooks.java:331)
at com.flansmod.client.handlers.ClientEventHandler.clientTick(ClientEventHandler.java:77)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_125_ClientEventHandler_clientTick_ClientTickEvent.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
at net.minecraftforge.fml.common.FMLCommonHandler.onPostClientTick(FMLCommonHandler.java:349)