Google play sign key

Question

My client has given me an android project to fix some errors and add new features. This app was created and published on google play console by another programmer who currently has gone. So, now comes time to upgrade to the new version, but I don't have the original signing key. So my client said me to create a new app in google play console and put the new upgraded version. But when I tried to upload signed bundle with new keystore I got this error

my build gradle picture

enter image description here

What can I do in order to solve this problem?

Upd: Same error when I upload release version. Also when I upload bundles of other projects to the app, no error occur.

Upd2: If my client request for 'Upgrade your app signing key for new installs'. Will it help?

Answer 1

So, here I write how I solve this problem.

1. Change application id in module build gradle file
2. delete testCoverageEnabled in module build gralde

b

buildTypes {
    release {
        testCoverageEnabled true
    }
}

3. Clean project
4. change version code