If your deadline to file a lien has not passed, you can file an amended lien, referencing the first lien by date and amount owed, and specifying the section that is being amended (the property owner's name).
However, if the deadline to file the lien has passed, things get more tricky. There's no clear way to go about changing the lien. I would recommend calling the county clerk's office, in the county where you filed, and asking them what the procedure is for changing a clerical error like this. It may be that you have to file a motion with a Court in that county to fix the eror. If this is the course of action you need to take, contact an attorney who can properly file the motion for you.