Defeat the percentages of a policyholder?!?!?!!

Hello guys, I hope you’re all doing well, with me it’s a bit problematic and I have a question. My grandpa lived here in Germany until 12 years ago and had also registered his car here. Now he lives in Greece and has covered his vehicle with a Greek insurance. Since he has always driven carefully, he had accumulated many damage-free years here in Germany and had to pay accordingly little insurance. Now I wanted to know, whether I could still get these harm-free years or whether they will expire after a certain time. Thank you in advance. Bye