$config['Database']['tableprefix'] Error

[Walerx]

I'm attempting to upgrade from version 3.6.7 to 3.6.8. I have uploaded the 3.6.8 files. When I visit the install/upgrade.php file, I get the following error:

$config['Database']['tableprefix'] is not empty!
Within config.php $config['Database']['tableprefix'] must be empty for the upgrade to proceed.

I've looked at every other thread wherein the aforementioned error was discussed, but the solutions given did not work for me.

[Steve Machol]

Check the database. Are you using a table prefix on the vB tables?

[Walerx]

Yes. My prefix is "vb", and that is how it is set in the config

[Steve Machol]

Please post that exact line in your config.php file.

[Walerx]

$config['Database']['tableprefix'] = 'vb';

[Steve Machol]

Fill out a support ticket at:

http://members.vbulletin.com/membersupport_contactform.php

Please include a complete description of the problem and be sure to include the login info to your Admin CP, phpMyAdmin and FTP in the 'Sensitive Data' field.