Problem with new stereo sonos setup

I just added a second Sonos Play3 and created a stereo pair. Prior to this my setup was working with the single Sonos Play3. Now that I've got the pair, using the same name, I'm getting this error:

Sep 17, 2016, 9:38:10 PM
Action Group Ocean On Sonos
Sonos Error Error in plugin execution ExecuteAction:

Traceback (most recent call last):
File "plugin.py", line 153, in actionZP_LIST
File "/Library/Application Support/Perceptive Automation/Indigo 6/Plugins/Sonos.indigoPlugin/Contents/Server Plugin/Sonos.py", line 1373, in actionDirect
UnboundLocalError: local variable 'CoordinatorIP' referenced before assignment

Not sure what I'm doing wrong!

It's possible the other Play 3 has become the owner of the stereo group in which case you should use that IP address for the device definition in Indigo. Only the owner of the group needs to be configured.

That did it, thank you! I wasn't able to see the IP address of the other speaker so I just unpaired them and re-paired them. During the process you're asked to press the volume up button on the left speaker. This apparently makes that speaker the master. This time I just made sure to do that with the first speaker I setup and it works like a charm!