In this case you need to re-upload your app to the to the existing app. Follow this steps to do it:
- Navigate to Playground and ensure you're logged in.
- Select an existing build you want to re-upload and click to the Cloud icon.
- Select build to upload it into Playground.
If you want to add this build as a new one, please, change package id in Luna Replay plugin and upload this build into Playground.