message at game server controle

[Attila]

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L2J Revision Number:6445
L2JDP Revision Number:9641

what is this what i se at game server controle some time ?
can some tell me what i need te do


[Character: The*****[268510703] - Account: maas81 - IP: 92.***.***.**] sent b
ad RequestBypassToServer: "npc_268461123_CancelCertification"
java.lang.NullPointerException
at com.l2jserver.gameserver.model.actor.instance.L2TransformManagerInsta
nce.onBypassFeedback(L2TransformManagerInstance.java:180)
at com.l2jserver.gameserver.network.clientpackets.RequestBypassToServer.
runImpl(RequestBypassToServer.java:162)
at com.l2jserver.gameserver.network.clientpackets.L2GameClientPacket.run
(L2GameClientPacket.java:70)
at com.l2jserver.gameserver.network.L2GameClient.run(L2GameClient.java:1
091)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)