I bought a used mavic air 2 and I want to delete the old sylvain****@hotmail.fr account. I get the error message -53255. I want to link it to my adekogan@gmail.com account Please help

Hi, there.
For this problem, you may need to contact the original owner to unbind his/her account first.
Please note that only the original owner can unbind his/her account.
Thank you.