Indicate second car insurance accident from pre-insurance? – Vehicle was total damage

Hello, I bought a used older vehicle at the beginning of the year and insured on me as a second car. My son had a self-inflicted car accident with opponents. Both vehicles total damage. Insurance took over the damage, son got his punishment. Now I want to buy a new vehicle and am not sure if I have to report the accident with my new insurance. I did not do the damage. I want to get a new vehicle at an On My son will of course drive the vehicle as well. I have to state the accident. My son is 19 and has already driven with 17. Maybe someone knows each other?