If it were me I'd ditch the fluff about Slave I's origins or rewrite it slightly rather than revamp the whole time period of my campaign or adventure.
Remember the Golden Rule of RPG Canon: the person who dictates canon at your table is not Lucas or Disney or JJ Abrams or FFG. It's you. You have the final say if something suits you or not. Don't like something from Wookieepedia? Throw it out! Want Daleks on Courscant? Exterminate away, baby!
Edited by Desslok