ugh, this is my mistake but i want to say it anyways, the save file needs a backup in case of accidental selecting new game (in my case when i enter the extra menu instead of choosing continue and believing that B work like cancel/return)
my game is already a little slow for some unknown reason and completing a character is already a work of my patience, collecting the 7 emeralds is a different subject, and doing a second run with a character because i choose new game by mistake takes all my energy and force me to play another game to cooldown