[23:51:01 INFO]: RobiBvB[/x.x.x.x:48954] logged in with entity id 53979496 at ([ASkyBlock_nether]-5615.5, 117.0, -8254.5)
[23:51:01 WARN]: Exception in thread "Craft Scheduler Thread - 262"
[23:51:01 WARN]: org.apache.commons.lang.UnhandledException: Plugin ChestShop v3.8.13 generated an exception while executing task 739443
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.lang.IllegalArgumentException: value already present: RobiBvB
at com.google.common.collect.HashBiMap.putInverse(HashBiMap.java:267)
at com.google.common.collect.HashBiMap.access$1000(HashBiMap.java:52)
at com.google.common.collect.HashBiMap$Inverse.put(HashBiMap.java:514)
at com.Acrobot.ChestShop.UUIDs.NameManager.storeUsername(NameManager.java:208)
at com.Acrobot.ChestShop.Listeners.Player.PlayerConnect$1.run(PlayerConnect.java:28)
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:59)
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
... 3 more