[help]Ошибки не понятного происхождения

Bad RequestBypassToServer:
java.lang.ArrayIndexOutOfBoundsException: -300
at com.l2emu.gameserver.datatables.ItemTable.getTemplate(ItemTable.java:
780)
at com.l2emu.gameserver.model.L2Multisell$MultiSellIngredient.<init>(L2M
ultisell.java:378)
at com.l2emu.gameserver.model.L2Multisell.prepareEntry(L2Multisell.java:
239)
at com.l2emu.gameserver.model.L2Multisell.generateMultiSell(L2Multisell.
java:170)
at com.l2emu.gameserver.model.L2Multisell.separateAndSend(L2Multisell.ja
va:267)
at com.l2emu.gameserver.model.actor.instance.L2OlympiadManagerInstance.o
nBypassFeedback(L2OlympiadManagerInstance.java:144)
at com.l2emu.gameserver.network.clientpackets.RequestBypassToServer.runI
mpl(RequestBypassToServer.java:183)
at com.l2emu.gameserver.network.clientpackets.L2GameClientPacket.run(L2G
ameClientPacket.java:76)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source
)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)