[00:32:09 WARN]: [Spartan] Task #89 for Spartan vBuild 207 generated an exception
java.util.ConcurrentModificationException: null
        at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_181]
        at java.util.ArrayList$Itr.next(Unknown Source) ~[?:1.8.0_181]
        at me.vagdedes.spartan.η.ψ.η(UndetectedMovementScheduler.java:12) ~[?:?]
        at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:76) ~[spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:361) [spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:739) [spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406) [spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679) [spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577) [spigot.jar:git-Spigot-2cf50f0-2b93d83]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_181]
[00:32:09 WARN]: handleDisconnection() called twice