Q: confirm apple iD

All apps are forever tied to the AppleID under which they were purchased.  You will need to delete all the apps purchased under your old ID, and redownload them with your current AppleID.

Best,

GDG

Hi

Having changed your Apple ID, check that you have signed in - using your updated credentials - to iCloud, iTunes & App Stores and all other Apple services that use your Apple ID:

• What to do after you change your Apple ID email address or password - Apple Support

Read the thread to which you posted and you'll find your answer!

Best,

GDG