Yes
delete that file, then do the following:
- Download and/or open the version of vBulletin which matches your version on your site
- Go to the do_not_upload folder
- Upload the tools.php file from this folder, make sure you upload this file to the /admincp/ folder on your site
- Navigate to the tools.php ([norpase]http://www.yourdomain.com/admincp/tools.php[/noparse])
- Look for Datastore Cache and click the [Bitfield Cache] option.
- Follow any instructions that may appear
- Make sure you delete tools.php as soon are you have completed the above