Just a few days ago I have changed my SHA-1 fingerprint (from signing to dev) for testing purpose. Now I want to go back to signing SHA-1 but it's not allowing me to add live SHA-1 fingerprint. It gives me duplicate fingerprint error.
I am sure that we do not have any other client id already registered with the app's fingerprint. We don't have any deleted project as well. My app is already in the Store I can't simply change the package or the keystore to make it work.
While updating SHA-1 fingerprint in the Google Cloud Platform developer console, I get the following popup:
Duplicate fingerprint
The fingerprint you specified is already used by an Android OAuth2 client ID in this project or another project
Anyone with a similar problem that managed to reach a solution?
I found a fix to this problem.
When the console asks you for the SHA1 and Package name for a new API that you are using in the same app.
Just keep the same SHA1 code and change the Package name a little. Eg: com.example.exampleapp to com.example.exampleapp1 .
I know this is not a full proof solution but i have many different google API calls in my app by just changing the package name a little.
I tried many solution from This but my simple fix helped me move on.
Hope this helps you.