“There are a couple of possibilities here. First, do you have another driver in your household, one who might be considered “riskier” from an insurance standpoint? If so, that may be the reason for your rate increase.
For instance, if you have a younger driver on your policy who was previously assigned as a driver for the Ford Fiesta, they might have been automatically assigned to the remaining vehicle on your policy. If that vehicle is deemed to be worth more, having this riskier driver assigned to it might increase your rates.