I have an existing app on the PlayStore. I am releasing new version of the app as staged rollout. However, I am not able to publish the app due to \"Fully S
Note: this solution works for the time it was posted if doesn't work in the future don't consider it wrong because things changes with time.
You have to deactivate previous version while uploading a new APK that works for me. Simply deactivate previous versions and upload a new APK and roll it out for production.