At every odometer update (when your trade-in quote expires every month) they will requote you. There is no guarantee that the quote will stay the same.
At my first odometer update, my trade-in value went down 45%. I did have a 3rd party quote from Autotrader but the first Tesla quote was the best one overall. In the end, at about the 2 month mark I got my VIN and I did another quote with Tesla, which was about 90% of the original trade-in quote, which I took since it also took off some taxes for the vehicle.
Definitely something to watch out for.