That's the sentry node.
Plan, as root in riverside:
task=T3761 puppet agent --disable "$task: dist-upgrade to bullseye" cd /etc sed -i -e 's/buster/bullseye/' /etc/apt/sources.list.d/* sed -i -e 's,bullseye/updates,bullseye-security,' /etc/apt/sources.list.d/debian-security.list git status git diff grep bullseye-security /etc/apt/sources.list.d/debian-security.list git add . git commit -m "$task: Migrate sources.list to bullseye" apt update apt upgrade -y apt dist-upgrade -y reboot puppet agent --enable && puppet agent --test