I use iOS 7.1.2 on my iPhone 4 and I would like to change my AppleID for the AppStore. In "Preferences > iTunes & AppStore", I already logged in with my new AppleID, and when relaunching Preferences, I am still logged in with my new AppleID.
But when trying to update an App from AppStore, I am supposed to type in the password for the old AppleID. I cannot find anything in AppStore to change the AppleID directly.
Is there anything I forgot to do?