On Debian 9.8 restarting the systemd user services as root with "systemctl restart user@<UID>.service" works for me:
# needrestart [...] User sessions running outdated binaries: root @ user manager service: systemd[6372] admin @ user manager service: systemd[2398] # systemctl | grep user@ [email protected] loaded active running User Manager for UID 0 [email protected] loaded active running User Manager for UID 1000 # systemctl restart [email protected] # systemctl restart [email protected] # needrestart [...] No user sessions are running outdated binaries. I hope this helps, Marco -- OpenPGP Key ID: 0x62937F7F

