Photos not exporting pictures, Unknown error (4)

If I have two different photos in my photos library with the same filenames (like "102_0228.JPG"), they both display in the Photos app just fine as different pictures. However, when trying to export one of them, it always returns the 'Unknown error (4)'. Other photos export without problems. As a workaround, I was able to click the option to "Edit with" and then 'Preview.' The Preview app would load the picture and from there I can save the photo. Any suggestions?