Build fails with the error "Execution failed for task ':launcher:checkReleaseDuplicateClasses'" when the In-App Purchasing package is installed

Package: In-App Purchasing

Android

5.4.X

How to reproduce:
1. Open the attached “IN-151054.zip” project
2. Build the project for Android (File → Build profiles)
3. Observe the pop-up window

Actual result: The build fails
Expected result: The build finishes successfully

Reproducible with: 5.4.0, 5.4.2 (6000.5.8f1)
Not reproducible with: 5.3.1 (6000.5.8f1)

Reproducible environment: macOS 26.6.1 (25G76) (M3 Max)

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