Duplicate BookID???

[Lonman]

Alright, I am loading all my laserdiscs (via kma/mpg files) into Hoster, letting Hoster pick the next bookid, when I transfer the files to my show computer (same database), it says I have a duplicate bookid and will not load the disc into my databse, however I checked the database through the search window with bookid only switched and that bookid does not currently exist when I call it up in the search compared to the buildsongdblog claim. What could be the problem? This is the only disc out of 60 that i've had an issue with. The bookid does not exist yet it is claiming it does???