Actually, this happens whenever I edit in Photoshop; HDR, Pano, Edit in...; you name it.
Any help out there?
The "Duplicate" Drive, or "Duplicate" folder, is a problem that has been seen by other users.
The best answer I have seen is by Jim Wilde, and a forum thread can be found here-
I suggest you read the answers by Jim very carefully, (particularly the third post in the answers), because the steps to correct the problem are fairly specific, and trying other steps usually does not result in a permanent solution.
That did not fix my problem.
Okay, I take it back. That did fix my problem, but with the following point of clarification. The difference between the two paths was the case of the letter in the D: drive. That is:
The first time I tried it, I selected the Pictures library folder under "This PC." Once I noticed the different cases of the drive letter, I made a point of choosing "Local Disk (D:)" and drilling down to the proper folder that way. This changed the case of the D: drive in Lightroom and solved the problem.
Thank you for the pointer, wobertc!