I bought a new computer and upgraded from Lightroom 5 to 6 at the same time. Had a very difficult time linking all my photos and keywords to the new edition (photos reside on an external drive), keywords never linked. I organize by date in the catalog on the left side of the screed. Somehow a key word that was used several years ago showed up as a folder in the date catalog and all photos from the date that Lightroom 6 was installed now fall under that folder. I can't find a way to delete the key word, now folder. I deleted the folder and all the photos under it but when I imported the photos again it re-established the troublesome folder. what to do?