Error when upgrading HELP!

[gonecountry]

I get this error when upgrading to 3.6.3

Database error in vBulletin 3.5.5:

Invalid SQL:
ALTER TABLE post_parsed RENAME postparsed;

MySQL Error : Table 'postparsed' already exists
Error Number : 1050
Date : Friday, November 10th 2006 @ 02:52:15 PM
Script : http://www.mommiesplayground.com/por...0b1.php?step=7
Referrer : http://www.mommiesplayground.com/por...0b1.php?step=6
IP Address : 69.14.70.36
Username :
Classname : vb_database

Any help wouldbe appreciated.