I used my Gmail address for my Nest account when I acquired a couple Nest Protects, some Nest cameras and a Nest thermostat. Google Home came along and of course I again used the same Gmail address. I acquired a second generation Nest camera and it cannot be set up on the Nest app so it is now on Google Home.
Nest asked me to migrate and since I want all of my cameras on the same app I tried to migrate everything to Google Home. When I tried I received the message "This Google Account is already linked with another Nest Account. Please select another Google account." Annoying.
From the advice in this thread,
it seems that for whatever reason it is not possible to migrate in my situation and the only option to get my devices on Google Home is to delete each device from my Nest account and then set each up in again in Google Home. A huge PITA.
One possible solution I was thinking off is creating a throw away Gmail account (Google account) and then changing the Gmail account my Nest devices are associated with to the throw away account and then migrating the devices to the proper account in Google Home.
Would this work? Any other way to do it without starting from scratch?
Did you start using the Google Nest app AFTER Aug. 19, 2019? If so, then you're already using a Google Account and do NOT need to migrate. Can you see your older Nest cameras and your Nest thermostat in the Google Home app? (The Nest Protects work ONLY in the Google Nest app.) If so, then maybe you got the migration email by mistake.
If not, and you started using the Google Nest app before Aug. 19, 2019 using a Google Account, then it seems Google Nest has left customers like you in an impossible situation.
I don't know why you are thanking me for my "helpful reply". What I pointed out is that if a customer started using the Google Nest app using a Google Account before Aug. 19, 2019, and that customer has also installed Google Nest devices in the Google Home app using that same Google Account, then it is simply NOT possible for them to now migrate their Nest Account to that Google Account and bring all their Google Nest devices together.
This is a clear Google Nest defect that needs to be corrected.
MplsCustomer, I'm sorry if you feel that way. Our team is working hard to deliver the best experience to our users — we'll take this as feedback.
They have two options if they receive this message: Google Account is already linked with another Nest Account.
Use the Google Account that’s linked to another Nest Account.