L2-scripts Форум - [core] Error (NOT BUG)

I was checking server log and i saw this.

Fresh installed server.
Код:
[21:20:41] ERROR Error could not store skills!

com.mysql.jdbc.MysqlDataTruncation: Data truncation: Out of range value for column 'class_index' at row 1

        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4094)

        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4028)

        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2490)

        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651)

        at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2734)

        at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)

        at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1379)

        at org.apache.commons.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:172)

        at org.apache.commons.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:172)

        at l2s.gameserver.model.Player.storeSkill(Player.java:5209)

        at l2s.gameserver.model.Player.addSkill(Player.java:5129)

        at l2s.gameserver.network.l2.c2s.RequestAquireSkill.learnSimple(RequestAquireSkill.java:150)

        at l2s.gameserver.network.l2.c2s.RequestAquireSkill.learnSimpleNextLevel(RequestAquireSkill.java:132)

        at l2s.gameserver.network.l2.c2s.RequestAquireSkill.runImpl(RequestAquireSkill.java:116)

        at l2s.gameserver.network.l2.c2s.L2GameClientPacket.run(L2GameClientPacket.java:49)

        at l2s.commons.net.nio.impl.MMOExecutableQueue.run(MMOExecutableQueue.java:38)

        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)