A week ago I was editing 800 pictures of my last holidays in Lightroom 5.2. After having them exported I noticed that I didn't check the quality settings for export, so I wanted to import the original files again.
And that's where I'm having issues right now. I can't open them anymore. Though they are all availabe, they are shaded in grey and are not selectable:
Going back to the original holidays folder, it strikes me that it's only possible to import such pictures which I haven't picked to edit in Lightroom before:
I tested other original files of pictures I already edited in Lightroom and they work. It's only about these holiday pictures. The exported, edited holiday pictures appear in Lightroom for importing. It seems like Lightroom has problems with the original files which has been imported to Lightroom once. An Update to LR 5.6 didn't help. Has anyone any idea how to solve this problem?
You don't re-import photos in Lightroom. There is no need to do so and this only would cause problems.
Instead, for those photos that you cannot import, you simply find them in the Library Module, and continue to use them (if you want to export them again at different settings, then you export from the existing photo in the Library module)