Of course you can. Any confirmed reservation is chargeable and non-refundable. However, if you wish to change the station for your car and/or parking spot reservation, it is possible to modify an ongoing reservation. If the new station has a higher reservation fee, you will need to pay for the price difference.
For example, if you make a car reservation at $1 at a selected station, then you decide to modify your reservation for a car reservation at another station where the reservation is set at $2, then you will be required to pay an additional $1 to make up for the price difference.