I just upgraded to Lightroom V6. I have a catalog that is about 200MB containing about 5000 images. When I backup the catalog on each exit of LR, it falsely reports that this catalog is greater than 4GB and therefore has to be accessed using some other method. I never saw this error in LR 5 using the same catalog. Why does LR 6 think the catalog is so large? How can I fix this problem? It's annoying, and I'm not sure my backups are usable now.