Here's what i did, can someone help how to get systemd back to the correct version so OMV can upgrade? Think this may have happened after I installed glances.
The following packages have been kept back:
$sudo apt install --only-upgrade openmediavault Reading package lists... Done Building dependency tree... Done Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: libnss-systemd : Depends: systemd (= 247.3-7+deb11u1) but 251.3-1~bpo11+1 is to be installed E: Unable to correct problems, you have held broken packages.
$dpkg -l | grep systemd
ii libsystemd-shared:amd64 251.3-1~bpo11+1 amd64 systemd shared private library ii libsystemd0:amd64 251.3-1~bpo11+1 amd64 systemd utility library ii python3-systemd 234-3+b4 amd64 Python 3 bindings for systemd ii systemd 251.3-1~bpo11+1 amd64 system and service manager ii systemd-sysv 251.3-1~bpo11+1 amd64 system and service manager - SysV links