PLEASE REVERT IF YOU THINK THIS IS NOT RIGHT, but it is the only way this f***ed upgrade script works reliably on the sites I needed to upgrade (and that had the same title twice. I changed the if statement from the complex parent_id, title check to a simple select on the cr_item table, checking if the name is already there. Obviously this is very inefficient (for each file you run yet another select) but it works reliably (with the old version I got errors on two sites)
