Bukkit

Server version spigot 1.10.2-R0.1! I get this error in console>>

Quote:

26.09 06:36:42 [Server] INFO ... 3 more
26.09 06:36:42 [Server] INFO at org.bukkit.craftbukkit.v1_10_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
26.09 06:36:42 [Server] INFO at org.bukkit.craftbukkit.v1_10_R1.scheduler.CraftTask.run(CraftTask.java:71)
26.09 06:36:42 [Server] INFO at ru.Den_Abr.ChatGuard.Listeners.ItemListener$1.run(ItemListener.java:43)
26.09 06:36:42 [Server] INFO at org.bukkit.craftbukkit.v1_10_R1.inventory.CraftItemStack.getItemMeta(CraftItemStack.java:321)
26.09 06:36:42 [Server] INFO at org.bukkit.craftbukkit.v1_10_R1.inventory.CraftItemStack.getItemMeta(CraftItemStack.java:379)
26.09 06:36:42 [Server] INFO at org.bukkit.craftbukkit.v1_10_R1.inventory.CraftMetaItem.<init>(CraftMetaItem.java:447)
26.09 06:36:42 [Server] INFO at java.util.HashMap$KeyIterator.next(HashMap.java:1453)
26.09 06:36:42 [Server] INFO at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429)
26.09 06:36:42 [Server] INFO Caused by: java.util.ConcurrentModificationException
26.09 06:36:42 [Server] INFO at java.lang.Thread.run(Thread.java:745)
26.09 06:36:42 [Server] INFO at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
26.09 06:36:42 [Server] INFO at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
26.09 06:36:42 [Server] INFO at org.bukkit.craftbukkit.v1_10_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
26.09 06:36:42 [Server] WARN org.apache.commons.lang.UnhandledException: Plugin ChatGuard v7.3.3 generated an exception while executing task 636
26.09 06:36:42 [Server] WARN Exception in thread "Craft Scheduler Thread - 167" ​