I needed to change upload key and I asked google play support for updating, after procedure finished I've created new release version of app, but after trying to upload whole to create new test I've received following pop-up message:
An unexpected error has occurred. Please try again. (7DBB89A5)
I've tried a few times, both with apk and aab file types, but both didn't work.
After about 12h everything started working fine.