I have four Play1 speakers. Stereo pairs were originally separated into two different rooms: speakers A+B and speakers C+D. For a good reason, I physically swapped speakers A and C, and split the stereo pairs via iPhone. But, am unable to set up the speakers as C+B and A+D. The system will only re pair the speakers as they were previously. Is there a way I can reset these speakers so they lose their previous associations?