Forum Install Error

[محروم.كوم]

Upgrading and ran into this at step 7 0f 13:

Database error in vBulletin 3.8.4:


Invalid SQL:
ALTER TABLE filedata
DROP INDEX posthash;
MySQL Error : Can't DROP 'posthash'; check that column/key exists
Error Number : -1
Request Date : Sunday, June 20th 2010 @ 0449 PM
Error Date : Sunday, June 20th 2010 @ 0456 PM
Script : http://akspokes.com/forum/install/up...0a1.php?step=7

Referrer : http://akspokes.com/forum/install/up...6&startat=2018
IP Address : 66.58.128.51
Username :
Classname : vB_Database
MySQL Version : __DEFINE_LIKE_SHARE__