WARNING error while restoring clan java.lang.NullPointerException
WARNING 268475949
java.lang.NullPointerException
        at net.sf.l2j.gameserver.model.L2Clan.setLevel(L2Clan.java:541)
        at net.sf.l2j.gameserver.model.L2Clan.restore(L2Clan.java:729)
        at net.sf.l2j.gameserver.model.L2Clan.<init>(L2Clan.java:151)
        at net.sf.l2j.gameserver.datatables.ClanTable.<init>(ClanTable.java:84)
        at net.sf.l2j.gameserver.datatables.ClanTable.getInstance(ClanTable.java
:62)
        at net.sf.l2j.gameserver.model.entity.ClanHall$AutoTask.run(ClanHall.jav
a:84)
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
        at java.util.concurrent.FutureTask.run(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.
access$301(Unknown Source)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.
run(Unknown Source)
        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)