my copied files still reference the master book as well as the new book

I copied a framemaker book and the files. The copied book is stored in a new location on my HD.  I noticed that when I updated the files in the new (copied) book  the same files in the original book were also updated.  So I renamed all the files in the copied book file and added them to the new book, then deleted all the files I copied first.  Now my new book contains files with new names.  Problem occurs  when I update the new book, I get errors as it references both the original book and the copied book location.  How can I delete the reference the system has to the original copied files?