The provided App differs from another App with the same version and product ID – While working with NAPA

Problem:
I’m currently developing a SharePoint 2013 Content App. After a few deployments via NAPA, I was suddenly confronted with the error “Deployment Error’: The provided App differs from another App with the same version and product ID”.

Solution:
But once the App is uploaded, SharePoint figures out that there still is an instance of the App. A first visual inspection of the SharePoint Developer site, indeed ‘My First Content App’ does not show up in ‘Site Contents’ overview.

If you keep getting the same error, SharePoint found an instance of the App in developer site.
After some further investigation, it turns out that the application is still visible via the “Apps in Testing” library.

Remove the App from the library then you should be able to deploy it.

Hope it helps someone!!!