Steve's GPG signature for Ubuntu Repository invalid... again... ?!

[nero355]

This has happened before : viewtopic.php?f=40&t=26115&p=208103#p208103

Now I could fix this, but what worries me is why this keeps happening every time ?!
How can I or perhaps Steve prevent this from happening ??

[seriousness]

I also get this when doing 'apt update':

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W: Während der Überprüfung der Signatur trat ein Fehler auf. Das Depot wurde nicht aktualisiert und die vorherigen Indexdateien werden verwendet. GPG-Fehler: http://download.opensuse.org/repositories/home:/stevenpusser:/palemoon-GTK3/xUbuntu_22.04  InRelease: Die folgenden Signaturen waren ungültig: EXPKEYSIG 0FAD31CA8719FCE4 home:stevenpusser OBS Project <home:stevenpusser@build.opensuse.org>
W: Fehlschlag beim Holen von http://download.opensuse.org/repositories/home:/stevenpusser:/palemoon-GTK3/xUbuntu_22.04/InRelease Die folgenden Signaturen waren ungültig: EXPKEYSIG 0FAD31CA8719FCE4 home:stevenpusser OBS Project <home:stevenpusser@build.opensuse.org>
W: Einige Indexdateien konnten nicht heruntergeladen werden. Sie wurden ignoriert oder alte an ihrer Stelle benutzt.

[seriousness]

Yep, renewing the key file fixed it.

When I tried to do this as in the thread nero355 linked, 'apt-key list' gives a warning:

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Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).

I renamed the old key file to 'home_stevenpusser_palemoon-GTK3.gpg.bak' and it worked.

[BenFenner]

I was about to post about this in another thread.
I'm running into this as well.

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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:/stevenpusser/xUbuntu_22.04  InRelease: The following signatures were invalid: EXPKEYSIG 0FAD31CA8719FCE4 home:stevenpusser OBS Project <home:stevenpusser@build.opensuse.org>Failed to fetch http://download.opensuse.org/repositories/home:/stevenpusser/xUbuntu_22.04/InRelease  The following signatures were invalid: EXPKEYSIG 0FAD31CA8719FCE4 home:stevenpusser OBS Project <home:stevenpusser@build.opensuse.org>Some index files failed to download. They have been ignored, or old ones used instead.

I'll see if I can apply the changes suggested above.

Edit:
I think I fixed things by following the advice to delete the current key described in this post: viewtopic.php?f=40&t=26115&p=208103#p207876
Then running these two commands:

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curl -fsSL https://download.opensuse.org/repositories/home:stevenpusser/xUbuntu_22.04/Release.key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/home_stevenpusser.gpg > /dev/null
sudo apt update