Type BuildConfig is defined multiple times

Question

I'm working on a multi module Android application and everything was working in a debug mode but now when I try to build a release package I'm receiving this error:

Type ***module1.BuildConfig is defined multiple times:
***/module1/build/intermediates/runtime_library_classes/release/classes.jar:***/module1/BuildConfig.class,
***/module2/build/intermediates/runtime_library_classes/release/classes.jar:***/module1/BuildConfig.class

It's the first time I'm seeing an error like this and I don't know how to fix this and what's even causing it. As far as I'm aware library modules shouldn't even be generating BuildConfig files in release mode.

Answer 1

check if both modules have a same package name

Answer 2

My Android Manifest Had the same Package Name for two Diferent Modules.

Answer 3

Most probably both shared AndroidManifest.xml and androidApp AndroidManifest.xml has the same packageId. They have to be different. For example, com.my.app.shared and com.my.app.android