The photo has already been imported or synchronized into your LrC catalog, and Lightroom Classic thinks it is in a different folder. You should NOT import or synchronize this photo again, this is completely the wrong thing to do.
This happens because (probably) you accidentally imported using COPY and not ADD, and so now LrC know about the COPY you told it to make, but doesn't know about the original you are looking at.
To fix this, first you need to find the photo in LrC. Follow all of these four steps in order:
1. In the Lightroom Library Module, on the left, under Catalog, click on All Photographs 2. Turn off all filters (Ctrl-L once or twice) 3. Turn off all stacking (Photo->Stacking->Expand All Stacks) 4. Search for at least one of these photos by file name using the Lightroom Filter Bar
Once you find it, we can give additional instructions if you want it to be in a different folder.