App Bundle key error message

[Anke]

@Alberto_rojas_lefort

I have other apps that were uploaded as .apk, so in order to upload a new version of any of these apps I should rebuild them with this new key, right?

No, use the same keystore and upload the update as an APK to the Play Store.
(Why make life difficult for yourself when it can be easy?)

Abb no puedo firmar / i can't sign abb

If your app was published on the Play Store before August 1, 2021, you can still upload it as an APK. The AAB restriction ONLY applies to new apps released after July 31, 2021.