I checked out many forum topics which were not of my help before creating a new topic
Describe your issue
AAB is signed with the wrong key!
I tried updating Keystore without overwriting it, but it was of no help either.
Steps to reproduce the issue
Try Uploading AAB to Play Console
Expected Behaviour
Usual App Update without any trouble, By the way, this is my first time uploading App Bundles for an update.