Adding a song from a disc already imported

[STE4funguy]

OK, there is a song called "Lying is the most fun a girl can have without taking her clothes off" THis song title is too long so it did not import with the rest of the songs on the disc. Now when I go back at try to import it with a shorter title, I get an error message stating

The BookID you have selected is already in use. Please select or type another BookID.

Unfortunatly, you can not change the BookID. I can highlight it, but can not make any changes.