can you reverse an adoption by stepparent?

It appears that this subject hasn't been raised in awhile, but I am a 60 year old female who wants very much to have my natural father's name back on my birth certificate. Both my natural parents and my stepfather are deceased, so it is mostly a matter of what future generations will find when/if they try to research their family tree. I would much rather they found the *correct* information on who my natural father was - NOT the stepfather whose name & pertinent information was filled in in place of the information originally put there about my natural father. This is a HUGE thing for me, as my stepfather abused & molested my sister & me for many, many years - and I'd like to permanently erase him from my birth certificate. I live in Northern California. Can anyone point me in the right direction? Thank you!