Clearmob-1.0.6 Error sponeforge-1.10.2-API6.0.-1872

[11:34:08] [pool-2-thread-3/ERROR] [Sponge]: Error occurred while executing command 'clearmob run entity' for source DedicatedServer: null
java.util.ConcurrentModificationException
        at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_101]
        at java.util.ArrayList$Itr.next(Unknown Source) ~[?:1.8.0_101]
        at net.minecraft.world.World.func_175644_a(World.java:3026) ~[aid.class:?]
        at net.minecraft.world.World.getEntities(World.java:379) ~[aid.class:?]
        at org.spongepowered.api.entity.Entity.getNearbyEntities(Entity.java:502) ~[Entity.class:1.10.2-2107-6.0.0-BETA-1873]
        at org.spongepowered.api.entity.Entity.getNearbyEntities(Entity.java:490) ~[Entity.class:1.10.2-2107-6.0.0-BETA-1873]
        at io.github.axle2005.clearmob.commands.CommandRun.clearGroups(CommandRun.java:200) ~[CommandRun.class:?]
        at io.github.axle2005.clearmob.commands.CommandRun.entityWhiteList(CommandRun.java:142) ~[CommandRun.class:?]
        at io.github.axle2005.clearmob.commands.CommandRun.execute(CommandRun.java:55) ~[CommandRun.class:?]
        at org.spongepowered.api.command.args.ChildCommandElementExecutor.execute(ChildCommandElementExecutor.java:179) ~[ChildCommandElementExecutor.class:1.10.2-2107-6.0.0-BETA-1873]
        at org.spongepowered.api.command.spec.CommandSpec.process(CommandSpec.java:351) ~[CommandSpec.class:1.10.2-2107-6.0.0-BETA-1873]
        at org.spongepowered.api.command.dispatcher.SimpleDispatcher.process(SimpleDispatcher.java:333) ~[SimpleDispatcher.class:1.10.2-2107-6.0.0-BETA-1873]
        at org.spongepowered.common.command.SpongeCommandManager.process(SpongeCommandManager.java:291) ~[SpongeCommandManager.class:1.10.2-2107-6.0.0-BETA-1873]
        at io.github.axle2005.clearmob.ClearMob.lambda$passive$0(ClearMob.java:135) ~[ClearMob.class:?]
        at org.spongepowered.api.scheduler.Task$Builder.lambda$execute$0(Task.java:138) ~[Task$Builder.class:1.10.2-2107-6.0.0-BETA-1873]
        at org.spongepowered.common.scheduler.SchedulerBase.lambda$startTask$0(SchedulerBase.java:177) ~[SchedulerBase.class:1.10.2-2107-6.0.0-BETA-1873]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_101]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_101]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_101]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_101]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_101]