book parents changed to children don't clear from the block

I had a book parent (the top of the book) and changed it to be a child under another book. Abb still thinks the node is a book top and it still shows up in the abb configuration list. I manually unchecked the book reference in the config area but technically it shouldn't be there any more if the book status changes.

I flushed all caches so I assume there is a stored value someplace that is not being cleared when the book changes status.