Lightroom Shows Duplicate Folder Structures After Moving Catalog to Windows

Good evening,

I'm reaching out for help with an issue I’ve encountered in Lightroom that I haven't been able to resolve.

I've been using Lightroom since 2012, and I store all my photos and catalog on my NAS.

I’ve always used Lightroom from my MacBook Pro, without any problems. My photos have always been well-organized in chronological order, as you can see under (Cvnas1\data).

The issue began two months ago when I purchased a new computer running Windows. I mapped the NAS drive as \V:.

As soon as I started adding new photos, along with some older ones that hadn’t yet been organized, Lightroom began creating a second photo location—even though all the files are physically within the same root folder.

I tried moving the old folders into the new list (top section), but Lightroom tells me it’s not possible because a folder with the same name already exists at that location.

How can I consolidate everything into a single, unified folder structure as I had before? Any ideas or solutions would be greatly appreciated.

Thank you!