Question Your App Bundle is signed with the wrong key

Hello everyone,

I have been working on the internal testing mode on Google Play Console.
I have updated Unity to the version 2021.3.15f1 from a previous version. I used the same key and password I had used on the previous version.

When I uploaded the new release on Google Console it told me the my app bandle is signed to the wrong key. It gives me the expected fingerprint that it should have and the one the app has (the wrong one).

I have looked on what to do - the only solution that is being suggested is to delete the app and make a new one. The only problem is that as it is not published yet and I can't find a way to delete it.

I am very new in this so any advice idea will be very much appreciated.

Thank you very much