It sounds to me that you've already paid off the judgment, so a motion to vacate is too late at this point unless you have some serious card in your hand and welcome an arduous, and potentially fruitless, fight.
I'm guessing you just want it gone.
As previously mentioned, the next step is to be sure a Warrant of Satisfaction has been filed. The rules to this vary from state to state. In my state, the judgment creditor has 30 days to file it. If they do not do it within that window, the judgment debtor can file a motion to have the judgment recorded as Satisfied.
As KFMAN said, one can try going the disputing with the CRA route. I haven't had much luck with this and judgments in the past, but maybe you'll get lucky, too.