Received this perplexing rookie error while trying to undertake maintenance on one of my virtual servers.

An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://packages.matrix.org/debian bullseye InRelease: The following signatures were invalid: EXPKEYSIG F473DD4473365DE1 matrix.org packages packages@matrix.org

Apparently apart from running the usual such as…

/usr/share/keyrings$ sudo wget -O /usr/share/keyrings/matrix-org-archive-keyring.gpg https://packages.matrix.org/debian/matrix-org-archive-keyring.gpg

…I needed to also hop into /etc/apt/sources.list and comment out the line…

deb https://matrix.org/packages/debian/ focal main

e.g From…

# deb-src http://security.ubuntu.com/ubuntu focal-security multiverse
deb https://matrix.org/packages/debian/ focal main
# deb-src https://matrix.org/packages/debian/ focal main

…To…

# deb-src http://security.ubuntu.com/ubuntu focal-security multiverse
# deb https://matrix.org/packages/debian/ focal main
# deb-src https://matrix.org/packages/debian/ focal main

After that, was able to upgrade my Matrix Synapse homeserver without error

Home time traffic on a Friday. Just as well I was working from home today. If I had to deal with this again on a regular basis. Would absolutely lose my freaking mind.

Auckland transport suggest that the Bus Driver Shortage afflicting the region will likely draw to a close in September. That long?

Unfortunately, it seems a few employers are still keen to force people back in the office at all costs while openly admitting that productivity while people were working from home was not actually a problem but simply to say it was “Sad” to walk into a sparse office – I struggle to see how this is a well throughout reason for lumping employees with such a heavy personal cost just to fill “bums on seats” in terms of personal time, commuting cost + stress along with mental health, and more importantly morale.