Replace systemd script with init script

[Helmut Schneider]

Hi,

I need to replace a systemd script with an init script. I know I can 
remove the existing one by

SERVICE=$MY_SERVICE
sudo systemctl disable $SERVICE
sudo rm /etc/systemd/system/$SERVICE
sudo rm /usr/lib/systemd/system/$SERVICE
sudo rm /lib/systemd/system/${SERVICE}.service
sudo systemctl daemon-reload
sudo systemctl reset-failed

but is that the proper way to do so? What if the package updates, will 
it replace the init script with the systemd script again?

22.04

Thank you!