I moved and had to leave my old Nest Protects behind. I removed them individually from the app and they no longer appear. I've just installed a *new* set which now give me a pulsing yellow heads up: "nest protect is offline in <three rooms I no longer have, and don't appear in the app>". The six that I've added do appear in the app, and appear green.
I'm not sure how to further troubleshoot, and would appreciate any theories
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