Returning to France for studies

Hello there,

I was in France for 1 academic year (2021-2022) as an international student and left France after 1 year. I have my Carte Vitale card and social security no.

I am planning to return to France to pursue Master studies next year. I need some clarifications and any help is much appreciated. Thank you.

1. What should I do when I return to France regarding the social security no and Carte Vitale card?

2. Do I have to re-apply for the social security no and Carte Vitale card?

3. I still have my old Carte Vitale card with me no, what should I do with it ?

Thank you.