Updating VPP apps installed via Configurator
We are setting up a series of iPads using a common AppleID. They will be used as kiosks by any of a number of users. The iPads will be managed using Meraki's MDM.
We have abandoned using app distribution because it would require individual AppleIDs for each device. Instead we are simply installing the paid app using Configurator during the setup process.
It was tricky to get this to work, but I found hints in various threads here: make sure to sign in using the common AppleID in both iTunes & Mac App store on the Configurator Mac. Also, authorize this Mac on that account in iTunes. Now the installation works.
However, app updates are posing a problem. Whenever I try to update the app on any of the iPads, it asks to sign in using another AppleID: the AppleID used to download the original .ipa app file that was loaded into Configurator. How do I get the app to be associated with the AppleID that's on the iPad (same as the ID currently on the Mac in iTunes & Mac App store), and ensure it won't require a password each time there's an update?