Problem with registration under 18

Hello, I have the following problem. I’ve had the A1 driver’s license for 9 months and drove a Honda Varadero 125. About 1 month ago someone in the stand drove on it unbraked and the following is a total damage of the machine. As a miracle I didn’t even have a scratch. Anyway, the motorcycle was registered on my father. My mother wants to prevent me from registering a new motorcycle by trying to convince my father that it doesn’t register any more What possibilities do I have to register the motorcycle without my parents. Also because of the insurance etc… Greetings and thanks in advance