Reset keystore password without entering old password android studio

It's a long time since this has been posted, but I've been thru this problem also (and had to entirely reset my app & lost my users). This was about to happen again, as AndroidStudio was telling me that the keystore was tampered with or I had wrong password. I knew it wasn't wrong password because it is stored in a password manager.
I stumbled upon a fix however & wrote it up at: https://stackoverflow.com/questions/72176501/why-does-androidstudio-fail-when-building-signed-apk-for-google-play-says-bad-p

The thing that fixed it was running the command-line keytool app like:
$ keytool -list -keystore 'fakeNmae.jks' -storepass fake-password-same-one-i-used-in-android-studio

except, of course, using the real password & keystore file name.
After that AndroidStudio built the signed APK & I couldn't believe it.

That hint might come late - but always have a backup of your keystore OFFLINE (on a usb stick for instance) that is kept secure and far away of all OS-updates, file system changes, IDE updates, etc.
With this you can always get your "original" keystore back.

Unfortunately this will not help in your situation, because you'd have restored your keystore already if you had such a backup.
Richard Deeming is right. You can't.
Would make all keystores and security completely obsolete if you would be able to reinitialize a keystore with a new password without telling the old one first.