Let’s say you have set up two rooms, or somehow duplicated your main room and now speakers are in the wrong place. In my case, I had two living room setups.
There is no way to delete a speaker, or room setup that I could find.
After spending all kinds of time trying to find an answer, I figured this out. I just went to ADD a speaker to the correct living room, at which point it will ask to remove it from the other setup. To make it easier, rename the other system to bathroom or something so you are not confused with the two living room setups you might have.
BINGO BINGO