I am trying to test the feature of in-app upgrade of android and to do so i have to upload the app in internal track. In order to do so i have made below required changes

1. enable the setting in google play store to participate in the internal testing

2. upload the app build in internal testing track

3. I have downloaded the app from the google play store

after that to check the in app update if i tried to change the version number and flash it into internal testing then it throws an error.

I have been trying to check this since more than a month but no luck , can one please help me out here