I took pictures from a Lightroom catalog and and used them as layers in Photoshop CC 2014 to create new pictures with unique file names. Those new pictures I saved in a new folder on the Mac desktop.
When I tried to import those new pictures into Lightroom they were greyed out even though I had checked off the box with 'do not import suspected duplicates'. Then I saved the original pictures that I had used from Lightroom in a folder on the desktop and deleted them in Lightroom
and tried to import again, still did not work. It appears so straightforward but isn't.