It’s just stupid as f*ck…
root@mbehrnsm-silver:~# service systemd-timesyncd stop
root@mbehrnsm-silver:~# service systemd-timesyncd disable
systemd-timesyncd: unrecognized service
root@mbehrnsm-silver:~# service systemd-timesyncd stop
root@mbehrnsm-silver:~# service systemd-timesyncd disable
systemd-timesyncd: unrecognized service
root@mbehrnsm-silver:~# systemctl disable systemd-timesyncd.service
Removed /etc/systemd/system/sysinit.target.wants/systemd-timesyncd.service.