I just stumbled across this reddit post and it actrfixed my problem.
Clearing the WWN settings on my original nest from the reset menu forced
it to generate a new key and then I was able to easily add it to the
existing home. Must have be a bug or co...
Agreed, this is stupid, here we are 8 months later and this is still a
problem for many. I have wasted 4 or 5 hours trying to reconfigure my
wifi router based on random things others have done to no avail. I spent
$350 to get them installed because m...