If you enable Google App Signing when setting up your app in Google's Play Store, you might have issues with the generated certificates when you upload a new APK for release, so it is recommended to opt-out of Google App Signing.
This article describes how you can deactivate/opt-out of Google App Signing, in case you have this setting enabled.
- You have an active Android app, with it's generated APK.
- You have a valid Google Developer Account
- Change the existing app name under Store Presence > Store Listing, then SUBMIT UPDATE.
- Start working on a brand New App with the correct app name. Follow Part 2: Uploading your App in the article Publishing an Android App.
- Once you upload the APK file, go to App Signing and click on OPT OUT.
- Accept the notice. Click I'M SURE, OPT OUT
- Click on the Confirm button.
- Complete the Google Play Store Listing, when asked, select the checkbox for I like to keep the old version so I can reference it.
- Delete the old version after the APK upload is successful.
You will not receive any error message upon uploading your APK and you will be able to proceed with the app publishing on the Google Play Store.