Incorrect Key Signatures Appearing in Parts

The score and parts are not showing the same thing. I may have messed around with the key signatures but deleted them in the score. The score shows that they are correct and plays fine. When I generate the parts, it leaves the deleted changes in. I have all but the alto part hidden in the score, which shows no key signature changes. The alto part has extraneous changes, which I do not want. The other instruments have the same issue as well; the alto is just an example. Can someone help?