From your previous post, it seems you upgraded your whole computer, not just MC:
https://yabb.jriver.com/interact/index.php/topic,119780.msg828185.html#msg828185It also sounds like you had some issues and had to muck around until you fixed it. My guess is that the drive letter changed on the new PC.
<theory>
So what may have happened is that you imported the existing library which pointed to the wrong drive letter, then configured auto-import with the new letter (which imported all files again, creating duplicates), then used the Rename tool to fix the drive letter on the old ones. Hence the duplicates.
</theory>
To fix that you'll need to delete the duplicates. One way to do that is:
- create a Smartlist to list all duplicates (shows the pairs of duplicate files)
- sort by Imported Date
- delete the older ones (or new ones, up to you depending on which metadata set you want to keep)
There's already a smartlist for duplicates, see if that works.