ubuntu@sruz:~$ dpkg-query -W systemd systemd 232-21ubuntu5 ubuntu@sruz:~$ loginctl show-session 3 1 | grep -e Id= -e Leader Id=3 Leader=1290 Id=3 Leader=1290
ubuntu@sruz:~$ dpkg-query -W systemd systemd 232-21ubuntu7 ubuntu@sruz:~$ loginctl show-session 3 1 | grep -e Id= -e Leader Id=3 Leader=1290 Id=1 Leader=1370
ubuntu@sruz:~$ dpkg-query -W systemd
systemd 232-21ubuntu5
ubuntu@sruz:~$ loginctl show-session 3 1 | grep -e Id= -e Leader
Id=3
Leader=1290
Id=3
Leader=1290
ubuntu@sruz:~$ dpkg-query -W systemd
systemd 232-21ubuntu7
ubuntu@sruz:~$ loginctl show-session 3 1 | grep -e Id= -e Leader
Id=3
Leader=1290
Id=1
Leader=1370