that database error did not mean anything :(

[VinnyVideo]

For some reason the MFGG site (not the forums) are giving database errors despite they not running in MyBB.

You pretty much answered your own question. Each piece of MFGG - the mainsite, the forums, the Wiki, both archives, and the high scores system - runs on a different MySQL database. Other than running on the same server, these databases are independent of one another. So if there's a problem with part of the mainsite database, it won't affect the forums.

Solving this database error proved to be trickier than expected, but everything should be fixed now.

Course clear! You got a card.