My old Apple ID still comes up when I log into App Store to update
I reset to a new Apple ID but when I update apps for the App Store my old Apple ID still comes up
iPad, iOS 10
Question marked as
Top-ranking reply
This probably is your problem. See What to do when the Mac App Store shows a different Apple ID for software updates https://www.macworld.com/article/3267709/mac-app-store-apple-id.html. This document refers to a prior owner, but is also applies to cases where a current owner's old Apple ID is the problem.
Basically, If an app is purchased/downloaded using one Apple ID, then you can't update it with another Apple ID. The app is inextricably linked to the first Apple ID. You'll have to delete it and repurchase/download it again with the second Apple ID.