Comment # 2 on bug 904215 from Thomas Blume

(In reply to Johannes Meixner from comment #1)
>
> Thomas Blume,
> 
> when after RPM package upgrade a systemd unit file does no longer exist
> (because it is no longer provided by the new RPM), what is the right way
> how to tell that to systemd?

You should run:

systemctl daemon-reload

in order to update the unit service file information for systemd.