Bukkit

What steps will reproduce the problem?
1.Don't know

What is the expected output? What do you see instead?

What version of the product are you using?
StatsAndAchievements v1.9.3
CB 1.4.6 R0.1

Do you have an error log of what happened?
2012-12-27 22:20:06 [SEVERE] Exception in thread "pool-1-thread-1133"
2012-12-27 22:20:06 [SEVERE] org.apache.commons.lang.UnhandledException: Plugin StatsAndAchievements v1.9.3 generated an exception while executing task 70
    at org.bukkit.craftbukkit.v1_4_6.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)
Caused by: java.util.ConcurrentModificationException
    at java.util.HashMap$HashIterator.nextEntry(HashMap.java:894)
    at java.util.HashMap$KeyIterator.next(HashMap.java:928)
    at de.maniacraft.statsandachievements.Update.insertEntrys(Update.java:94)
    at de.maniacraft.statsandachievements.Update.run(Update.java:56)
    at org.bukkit.craftbukkit.v1_4_6.scheduler.CraftTask.run(CraftTask.java:53)
    at org.bukkit.craftbukkit.v1_4_6.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
    ... 3 more

Please provide any additional information below.

More logs: http://pastebin.com/NNyWR1V7