App Store asking for another Apple ID
Previously both my phone and my wife's phone were linked to the same Apple ID and my wife wanted to change this to link her phone (iPhone 6S) to her Apple ID. Since doing this there is a problem in downloading some app updates from the App Store using my wife's Apple ID. To update these apps I need to log her phone out of her Apple ID and reconnect her phone to my Apple ID. How can one fix this so that all app updates can be downloaded from the App Store using her Apple ID?
iPhone 6s