Motorcycle Damage-free years on car take over

This is a case of my own fault, but still nasty. I sold my motto wheel and bought a car. Had SF8 before and wanted to take it with me. At Check24 I picked out a cheap insurance (250€ at Admiral-Direkt) , unfortunately I missed that somewhere in the details is that damage-free years are only taken over by car .. The insurance is also not Kulant and I can not out for a year (is 490€…) Have also sometimes all of course Admiral is the only insurance with this scheme. Are insurance companies obliged to accept damage-free years? Can I get out of there as I assumed another price? Otherwise any ideas? Thank you very much! Greetings Andi