Hi! I tried to edit /etc/systemd/timesyncd.conf to add fallbackntp but always changes to the default file that only has one line for one server

I tried to edit the files in nodes by using the command to edit images: qlustar-image-edit -e Standard-focal /etc/systemd/timesyncd.conf

I tried also with chroot-focal

Maybe someone could know how to do it, thanks!