Phantom Sonos Group

Hi, I have 4 Sonos zones 2 of which are named Living Room and Kitchen. In the Sonos app, they appear separately and can be grouped and ungrouped. But Roon seems to have created a permanent Living Room - Kitchen zone (in addition to the Living Room zone!) that I can’t ungroup.

If it was just the display of the names, I wouldn’t mind, but the elements of the Living Room - Kitchen - Living Room group don’t start playing at the same time. TIA