Unistalling Mods

[Shotgunmaniac]

I was previously using 3.8.5, and upgraded to 4.0.

I am having the following errors while uninstalling mods as they are conflicting with my shoutbox.

Database error in vBulletin 4.0.0:

Invalid SQL:
ALTER TABLE VBpost DROP COLUMN mh_pbc_colorschemeid;

MySQL Error : Can't DROP 'mh_pbc_colorschemeid'; check that column/key exists
Error Number : 1091
Request Date : Friday, June 25th 2010 @ 08:11:32 PM
Error Date : Friday, June 25th 2010 @ 08:11:32 PM

Database error in vBulletin 4.0.0:

Invalid SQL:
ALTER TABLE VBforum DROP closedthreaddec;

MySQL Error : Can't DROP 'closedthreaddec'; check that column/key exists
Error Number : 1091
Request Date : Friday, June 25th 2010 @ 08:12:33 PM
Error Date : Friday, June 25th 2010 @ 08:12:33 PM

Any help would be really appreciated. Thanks in advance.