[16:48:01 WARN]: Exception in thread "pool-3-thread-42"
[16:48:01 WARN]: org.apache.commons.lang.UnhandledException: Plugin Stats v3.0.2
-382 generated an exception while executing task 40
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyn
cTask.java:56)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.util.ConcurrentModificationException
        at java.util.LinkedList$ListItr.checkForComodification(Unknown Source)
        at java.util.LinkedList$ListItr.next(Unknown Source)
        at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.wr
ite(CollectionTypeAdapterFactory.java:95)
        at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.wr
ite(CollectionTypeAdapterFactory.java:60)
        at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(Typ
eAdapterRuntimeTypeWrapper.java:68)
        at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(Map
TypeAdapterFactory.java:239)
        at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.write(Map
TypeAdapterFactory.java:145)
        at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(Typ
eAdapterRuntimeTypeWrapper.java:68)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(Re
flectiveTypeAdapterFactory.java:89)
        at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.wr
ite(ReflectiveTypeAdapterFactory.java:195)
        at com.google.gson.Gson.toJson(Gson.java:593)
        at com.google.gson.Gson.toJson(Gson.java:572)
        at com.google.gson.Gson.toJson(Gson.java:527)
        at com.google.gson.Gson.toJson(Gson.java:507)
        at nl.lolmewn.stats.storage.FlatfileStorageEngine.save(FlatfileStorageEn
gine.java:87)
        at nl.lolmewn.stats.user.StatsUserManager.saveUser(StatsUserManager.java
:36)
        at nl.lolmewn.stats.bukkit.BukkitMain$1.run(BukkitMain.java:259)
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java
:53)
        at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyn
cTask.java:53)
        ... 3 more