Origin story's of an old character

Hello, I've played this game for quite a while years ago and took a break for some years, with that said, I created a Zabrak with the intention of roleplaying as Darth Maul. Sith Warrior would be the more fitting Origin story to roleplay as, but here's the problem, when I created this character the only possible origin story to play as a Assassin with a dualsaber was the Sith Inquisitor and nowadays it's possible to play an Assassin Sith Warrior. So I wonder if there's any possible way of changing my origin story for that character specifically, because there's so much time, effort (and money) invested on this charcater for the outfit, professions, companions and etc. I know it sounds nit picky but one of the most positive and attractive Pro of this game is the Roleplay factor. I'd not mind having to re-do the origin story for the sith warrior, and also lose the progress for the sith inquisitor one.

Thanks