Forum urgent: Error Number:1283 while updating from 3.8.6 to 4.0.7
 

Hello,

i have this error while i update my vb3.8.6 to 4.0.7

in update vBulletin installation to version 4.0.0 Beta 5

and in step 2/2 i have this error

Code:
Database error in vBulletin 4.0.0 Beta 4:

Invalid SQL:
ALTER TABLE searchcore_text MODIFY title VARCHAR(254) NOT NULL DEFAULT '';

MySQL Error : Column 'keywordtext' cannot be part of FULLTEXT index
Error Number : 1283
Request Date : Tuesday, September 21st 2010 @ 05:47:07 PM
Error Date : Tuesday, September 21st 2010 @ 05:47:08 PM
Script : http://www.alqeraat.com/vb407/instal...0b5.php?step=1
Referrer : http://www.alqeraat.com/vb407/install/upgrade_400b5.php
IP Address : 91.144.37.8
Username :
Classname : vB_Database
MySQL Version : 5.1.48
any one can help. it's too urgent

Best Regards