Upgrade Vb4 to Vb6 - Error on Step 7

[fingertips]

Im trying to upgrade my board to vb6 but when i reach to step 7 i get this error:

Database error in vBulletin 3.0.0 Beta 4:
Invalid SQL: UPDATE template SET styleid = -10 WHERE styleid = -1
mysql error: Duplicate entry 'calendar_showbirthdays--10' for key 2
mysql error number: 1062
Date: Thursday 18th of September 2003 10:41:45 AM
Script: http://*/install/upgrade3.php?step=7
Referer: http://*/install/upgrade3.php?step=6
Username: *
IP Address: *


Why is this happening?

[Boxy]

If you haven't done so already, back up your database first, then run this query

 DELETE FROM template WHERE styleid = -10

Then re-run the step7 of the upgrade again.

[fingertips]

If you haven't done so already, back up your database first, then run this query

 DELETE FROM template WHERE styleid = -10

Then re-run the step7 of the upgrade again.

thanks it worked