1. There was a delay in updating the information: the information of the newly bought car was not synchronized to 12 123 in time, which made it impossible to add it. You can wait a while before adding it.
2. The original owner has bound the vehicle: the vehicle has been bound by the original owner, so the new owner can't directly add the vehicle on 12 123, and can negotiate with the original owner to unbind the vehicle before adding a new vehicle.