Unable to update apps due to previous Apple Account on App Store

Hi! So uhm, I’m not sure if this is something you’ll understand based on my explanation but. Basically what’s happening is that when I try to update my apps it tells me “your Apple ID or password if incorrect”, thing is I’m logged onto a different Apple ID and the password it’s asking me for is the previous ID which, I do not know the passcode of since it was a relatives of mine—I’m wondering if it’s just a “wait for a few hours” issue or do I need to do something for it to register MY Apple ID..

[Re-Titled by Moderator]