Suite Upgrade freezes at upgrade_400a1.php?step=6
 

Hi,

I'm trying to migrate a huge forum from vBulletin 3.8.4 PL2 to 4.0.0 PL1.

But when the installation reaches the step upgrade_400a1.php?step=6, the page is loading for a long time... then stops loading, with nothing more displayed than
Quote:
Step 6) Attachment System Alterations (3/4)

And if I try to refresh the page, I get an error :
Quote:
Step 6) Attachment System Alterations (3/4)
Altering filedata Table (1 of 12)
Database error
[...]

Database error in vBulletin 3.8.4:
Invalid SQL:
ALTER TABLE vb_filedata
ADD width SMALLINT UNSIGNED NOT NULL DEFAULT 0;

MySQL Error : Duplicate column name 'width'
Error Number : -1
[...]

After reloading my backup database, I tried to tweak my php.ini by enlarging the settings max_execution_time, max_input_time and memory_limit, but this did not help, the second try aborted at the same point.

My attachments are stored in database.