Avahi keeps a cache of old results. To reset the cache, kill the daemon. It will auto-restart.
sudo avahi-daemon --kill
If you really want to stop the daemon, killing it is not sufficient because it will just restart. To stop it completely:
sudo systemctl mask avahi-daemon.socket sudo systemctl disable avahi-daemon sudo systemctl stop avahi-daemon
Avahi is not set up to publish records by default. This has to be explicitly allowed in the config file. In /etc/avahi/avahi-daemon.conf, add the following lines:
[publish] disable-user-service-publishing=no
Then restart the daemon
sudo systemctl restart avahi