Hello, the attempt to update the RPi 4B ends with the message below. How to solve it? Err:3 http://download.opensuse.org/repositories/home:/smplayerdev/Debian_11 InRelease The following signatures were invalid: EXPKEYSIG 6FD77D5EDF966437 home:smplayerdev OBS Project <home:smplayerdev@build.opensuse.org> W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://download.opensuse.org/repositories/home:/smplayerdev/Debian_11 InRelease: The following signatures were invalid: EXPKEYSIG 6FD77D5EDF966437 home:smplayerdev OBS Project <home:smplayerdev@build.opensuse.org> W: Failed to fetch http://download.opensuse.org/repositories/home:/smplayerdev/Debian_11/InRele... The following signatures were invalid: EXPKEYSIG 6FD77D5EDF966437 home:smplayerdev OBS Project <home:smplayerdev@build.opensuse.org> W: Some index files failed to download. They have been ignored, or old ones used instead.