I had two deco networks set up in two different houses, but we sold one house and now I want to add the units from that house to my existing network.  My existing Network has 8 units currently on it, all either M9 Plus or M5 units.  I have reset the units that I am transfering, and I get a flashing blue light, but when I try to connect the unit, the app tells me that "we couldn't find another Deco."  I have placed the new deco right next to a working one.  

Is there any reason why it wouldn't be ablt to add these units? I've tried it with two different units from the old system, and both failed during set up. 

I've never had an issue adding units in the past.