Essentially the apps have same package name but different signatures and the app store that installed it should be the only one to recognize and update it.
But Google is likely trying this dark pattern to sway people away from F-Droid or alt stores by making users uninstall these apps and install it from the Google Play Store.
It’s been going on for a while and is annoying af.
Yep, this has been happening for a long long time already. It’s due to F-Droid using the same package name but a different signature.
So from the perspective of any other store, it looks like someone tampered with this app.