The first question I'd ask is why was summary judgment entered? Were you served with the summons? If so, did you answer? If not, why not? Did you have any defense interposed? Was there a hearing on the merits?
A judgment in one state is entitled to full faith and credit in all other states. You'd have to get it withdrawn in the state where it was rendered. Most states permit judgments to be overturned if there was no service, or if it was obtained by fraud, provided there is some bona fide defense. But you'd need a lawyer to do it.