@Optimus2025
Usually you would get a message like that if you were trying to re-install a Google Nest device that had NOT been successfully factory reset.
Did your factory reset get the results documented here? (I.e., the Nest Hub reported it was resetting?)
https://support.google.com/googlenest/answer/7073477
If that's of no help, you could try contacting Support:
1. Go to https://support.google.com/googlenest/gethelp.
2. Select a category/product family, and type in a brief description of the issue, then click "Next".
3. Select your device from the dropdown, click "Other", then click "Next step".
4. Under "Resources", just click "Next step". (Clicking one of the listed links will bring up a Help page.)
5. Under "Contact options", choose to get a phone call or chat with the team, depending on availability in your country.
