Now I'm getting a database error.

Database error in vBulletin Control Panel 2.2.1:
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Invalid SQL: ALTER TABLE forum ADD collapsed SMALLINT DEFAULT '0' NOT NULL
mysql error: Duplicate column name 'collapsed'
mysql error number: 1060
Date: Saturday 12th of January 2002 01:59:01 PM
Script:
http://www.simpsonsboard.com/~simpso...all.php?step=2
Referer:
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I have the little icons next to the forum descriptions, and if I click on 'expand' the 'collapse' button will appear, but nothing changes other than the picture.