Just posting this list of song titles does not help us help you. What is this an index of? Duplicate error means there exists a song title in whatever index you are trying to add to. Check your index in the Content Manager to see all of the songs contained in the specific index. Do no post index data in the forum.
Ok, no data, got it.
I followed the bread crumbs and found the book index I thought was empty wasn't .
Thanks for the reply, I'm gonna delete and bulk reload with the "fixed" data.