I'd remove the new UNC files, then use [url=https://www.mediamonkey.com/wiki/WebHelp:Adding_Existing_Files_to_the_Library/5.0#Manually_Locate_Moved/Missing_Files]Locate Moved/Missing Files[/url] to locate the Mapped files on the UNC Paths, after first making a [url=https://www.mediamonkey.com/wiki/WebHelp:Backing_up_the_Library/5.0#Backup_the_MediaMonkey_Database]database backup[/url].

Of course you can [url=https://www.mediamonkey.com/wiki/WebHelp:Exporting_Playlists/5.0]export Playlists[/url].

Is there any way to preserve the playlists by exporting and reimporting after doing a find and replace with the UNC path?

You can delete from the [url=https://www.mediamonkey.com/wiki/WebHelp:Library/5.0#Location]Location node[/url].

Do note that if you remove the Mapped Drive that the files will be removed from any Playlists they're on and unsaved data (like Play History) is lost.

I'm sorry, I found it, and yes I've done this before, so apologies and thanks for answering so quickly.
I'm fixing the DriveID.

That's the thing, I don't recall switching it to scan UNC, but it's currently set to UNC. I have had a mapped drive for years but was planning to go to UNC for the centralized DB option, but I hadn't touched anything yet.
How do I purge the mapped drive songs from the dB?
Thanks.

UNC would be preferred. However if you don't scan the incorrect Path, the files won't duplicate.

What was the original Path scanned? Mapped or UNC?

Yes, that's the issue. It's reading from the UNC path and the mapped drive. Should unmap the drive?

Do the duplicates have the same Path or a different Path (verify full Path)?

After the most recent update .2827, I'm seeing double. I know this has happened to me before, years ago but I can't find the post. I've confirmed that all the folders have single copies, but every song shows up double in MM5.
I ran a DB cleanup with everything, same.
I ran a full rescan, same.
My music files live on a Synology NAS accessing them over a UNC path.
Any help would be appreciated.