Hi,
I am experiencing the exact same issue of similar upgrade codes for two separate installations that create separate entries under "Apps and Features" in Windows 10. I do not have the "Qverride Windows Installer programs list entry enabled".
I'm using AI16.7 and the Product key is changed each time a release is triggered from our DEVOPS CD release step.
We only seem to be experiencing this issue when the release is done using a build on a non production branch and installing that on along side the already installed production version.
I couldn't find any corrupt registry values for our product as hinted in the previous reply. Please help.