[14:01:12 WARN]: org.apache.commons.lang.UnhandledException: Plugin Stats v3.0.1-359 generated an exception while executing task 37
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.util.ConcurrentModificationException
        at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:966)
        at java.util.LinkedList$ListItr.next(LinkedList.java:888)
        at nl.lolmewn.stats.mysql.MySQLStorage.save(MySQLStorage.java:189)
        at nl.lolmewn.stats.user.StatsUserManager.saveUser(StatsUserManager.java:36)
        at nl.lolmewn.stats.bukkit.BukkitMain$1.run(BukkitMain.java:254)
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71)
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
        ... 3 more