Can't update system due to GPD Error: http://download.opensuse.org/repositories/home:/Provessor/xUbuntu_20.04

[Sharkuel]

Whenever I try to update my system, I get the following message:

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: Index of /repositories/home:/Provessor/xUbuntu_20.04 InRelease: The following signatures were invalid: EXPKEYSIG 876292BF7F9C32BF home:Provessor OBS Project home:Provessor@build.opensuse.org
W: Failed to fetch http://download.opensuse.org/repositories/home:/Provessor/xUbuntu_20.04/InRelease The following signatures were invalid: EXPKEYSIG 876292BF7F9C32BF home:Provessor OBS Project home:Provessor@build.opensuse.org
W: Some index files failed to download. They have been ignored, or old ones used instead.

Upon researching the internet, as afar as I understood, the issue lies on the key expired. I tried downloading it again, but with no success.

My question is: is there another way of circumventing this, or should I simply remove the faulty repository from the system?

Thanks in advance for the help.

[Aravisian]

@Sharkuel

or should I simply remove the faulty repository from the system?

Yes, you must remove the repository.
This falls under security: You can imagine if users can circumvent the security in place that keeps third-party repositories safe.
The maintainer may have abandoned the project. But you may try contacting them and alerting them to the issue to see if there is simply a mistake they can fix.

[Sharkuel]

Yeah I suspected as much.
Well, gonna delete it then, I just wanted to be sure. Thanks for the input!