error boot

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L2J Revision 3241:
L2JDP Revision 6342:

upgrade and I have this error.

Highest item id used:22172
Initializing ClanHallManager
error while saving new Forum to db com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '5' for key 1
L2World: Setting up World Regions
L2World: (136 by 136) World Region Grid set up.
Restored 6 clans from the database.
Loaded: 1 clan halls