lightroom classic problem naming Diskstations under 'Maps'

hello, I had a chat with Adobe about my problem with Lightroom Classic software. But they didn't come out of it. Hopefully someone from the community has a solution. I bought a new PC and when I migrated the catalog and photos to the new PC, everything went 'right'. However, there is one problem. I hope I can explain it well. The Folders column lists the disk drives with the folder structure per drive below. 

My problem is that after migrating the catalog to the new PC there are now two Disk Drives (so I don't mean folders) listed that both point to my NAS drive where the pictures are. Both are named almost the same, only slightly different (large and small letters and a backslash at the end less). Under the old name is the root folder 'archive' with the entire folder structure underneath. Under the new name are a number of separate folders from the main structure that I did not use and are actually also under the old name. Some of these folders only have a few more photos. The new import is also here, but also as 'separate' folders, while these folders should have come under an annual folder. I actually want to have everything under the new name, but that doesn't really work. Moving the root folder 'archive' to the renamed disc drive cannot. 

See attachment: the top disc drive comes from the old PC, the bottom one is created on the new PC. I want to have everything under the old name under the new name e. and remove the old See attachment: the top disc drive comes from the old PC, the bottom one is created on the new PC. I want to have everything under the old name under the new name and remove the old one

Hopefully there is someone who understands and can help me...

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