Fix Google Play Error 3n -- 2

Job ID: 40277035

Budget: €8 – €30 EUR

I'm looking for immediate support to resolve the "Error 3 - Code Already Used" I receive when attempting to upload an AAB package to the Google Play Console.

Current Situation
• The app compiles and launches successfully locally.
• When uploading the AAB release, the console blocks the publication, reporting Error 3 with the message "Code Already Used."

What I Need
1. Quick analysis of the Gradle project to identify the cause (versionCode/versionName, signature, automatic increments, any pending artifacts).
2. Correction of the offending parameters and generation of a new signed AAB.
3. Successful upload of the release to the Google Play Console with my confirmation.

I will accept the job when:
• The corrected AAB is accepted without errors by the console.
• I receive brief notes on what has been changed to prevent the issue from recurring.

We work with Android Studio (latest stable) and an updated Gradle wrapper; I'll provide a keystore, limited console access, and a private repository. I'm looking for someone who's already worked around this exact bug and can get it done in a few hours.