Sonos lost after power outtage

After the power went off I lost my Sonos. Unfortunately I had not fixed its IP, due to having switched from cable to Wifi.

Having said that, what would be the way to re-discover the device?

What do I need to delete to make homeassistant fully forget the sonos, and consequently reinstall?

Im a fucking retard; the Sonos was elsewhere in my configuration file with the wrong ip.