Duplicate Book Id Numbers

[mrmacjr]

I have either imported from discs, being careful to do them in order or have used the external hard drive to mass import. I did not know if I could delete the song.mdb and the back up and create a new song.mdb. It seems like Doug had tole me to delte songs. mdb,song back and something else and then rebuild the database(this was bay back on 2.015 or so when chartbuster had a problem with the song on a disc). Are there files i can delete and then reuild the database.