How to App Error: Remove Conflicts from the Manifest Before Uploading

Introduction

When submitting a new app listing to Google Play, you may see the error:

Remove conflicts from the manifest before uploading

This indicates that your Android application’s package name (application ID) conflicts with an existing app or a previous listing. Use the steps below to resolve package name conflicts and successfully upload your build to your new Google Play developer account.

Resolve Package Name Conflicts

1. Use a Unique Application ID
   Ensure your app’s applicationId in Gradle or AndroidManifest.xml is completely unique and not associated with any previous apps on your old developer account.
   
2. Rebuild with the Updated Package Name
   After updating the applicationId, run a clean build (e.g., ./gradlew clean assembleRelease) to include the new ID in your APK/AAB. Verify the built artifact’s manifest reflects the change.
   
3. Update Firebase and Backend Configurations
   In the Firebase console, register a new Android app using the updated package name. Download its google-services.json and replace the old file in your project. Also confirm any server-side services or API keys reference the new ID.
   

Troubleshooting and FAQs

Q: I still see the manifest conflict after updating the ID.
A: Clear all build caches with ./gradlew clean, uninstall any previous app versions from your device, then rebuild and reupload.