Duplicate files and book id numbers

[is14fun]

I've started a project to pick the best duplicate songs by editing and selecting what I believe to be the best to be. My problem is I don't want to change the book ID number as that number is the one my song books have in them for that song. I have a file of duplicates that are currently not in my library so they have no book id number yet. I use microstudio to view these files and compare them to the ones I have in Hoster. When I find a duplicate I like better the the one in Hoster, I want to switch them without changing the book id number. Can that be done?