[16:42:58 WARN]: [NpcSkin] Task #110 for NpcSkin v2.0 generated an exception
java.util.ConcurrentModificationException: null
        at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_231]
        at java.util.ArrayList$Itr.next(Unknown Source) ~[?:1.8.0_231]
        at java.util.Collections$UnmodifiableCollection$1.next(Unknown Source) ~[?:1.8.0_231]
        at me.libraryaddict.disguise.DisguiseAPI.disguiseToAll(DisguiseAPI.java:251) ~[?:?]
        at it.soulnetwork.NpcSkin.NpcSkin.updateSkins(NpcSkin.java:134) ~[?:?]
        at it.soulnetwork.NpcSkin.NpcSkin.access$000(NpcSkin.java:28) ~[?:?]
        at it.soulnetwork.NpcSkin.NpcSkin$1.run(NpcSkin.java:47) ~[?:?]
        at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:64) ~[patched_1.12.2.jar:git-Paper-1618]
        at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:423) ~[patched_1.12.2.jar:git-Paper-1618]
        at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:840) ~[patched_1.12.2.jar:git-Paper-1618]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:423) ~[patched_1.12.2.jar:git-Paper-1618]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:774) ~[patched_1.12.2.jar:git-Paper-1618]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:666) ~[patched_1.12.2.jar:git-Paper-1618]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_231]