How to fix "Variant selection conflict found"?

Question

In my project I have a few modules. If Build Variant tab all in debug build variant all is ok

But if I change one of the module to release build variant his dependency modules also change to release, but with kind of error

I tried this solution

https://stackoverflow.com/a/52011770/5709159

for me it doesn't work

How to fix it?

Answer 1

Hover over the red area you can see the reason:

Module 'XXX' has variant 'release' selected, but the module "XXX" depends on variant 'debug'

It's because the dependent modules are using the wrong building variant.