13:22:37 [WARN] [Mantle] Task #50 for Mantle v1.2.0 generated an exception
java.util.ConcurrentModificationException
at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:966) ~[?:1.8.0_25]
at java.util.LinkedList$ListItr.next(LinkedList.java:888) ~[?:1.8.0_25]
at us.corenetwork.mantle.restockablechests.CompassDestination.clearExpiredOldDestinations(CompassDestination.java:132) ~[?:?]
at us.corenetwork.mantle.restockablechests.CompassDestination.getOldDestinations(CompassDestination.java:118) ~[?:?]
at us.corenetwork.mantle.regeneration.StructureChecker.run(StructureChecker.java:77) ~[?:?]
at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot-1.8-dev.jar:git-Spigot-59b08be-0899683]
at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [spigot-1.8-dev.jar:git-Spigot-59b08be-0899683]
at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:694) [spigot-1.8-dev.jar:git-Spigot-59b08be-0899683]
at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [spigot-1.8-dev.jar:git-Spigot-59b08be-0899683]
at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:623) [spigot-1.8-dev.jar:git-Spigot-59b08be-0899683]
at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:526) [spigot-1.8-dev.jar:git-Spigot-59b08be-0899683]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_25]
13:22:48 [INFO] UUID of player ghowardtx is 7fd92b89-7879-4c5
Saving it just in case.