[quote=Lowlander post_id=496675 time=1649862397 user_id=262]
You may have Folder Monitoring enabled which will auto-scan the new drive before you change the driveID of the old drive: https://www.mediamonkey.com/wiki/index.php/Moving_MM_to_a_new_computer
[/quote]
I'm all good now, thanks.

You may have Folder Monitoring enabled which will auto-scan the new drive before you change the driveID of the old drive: https://www.mediamonkey.com/wiki/index.php/Moving_MM_to_a_new_computer

[quote=Lowlander post_id=496672 time=1649861073 user_id=262]
The Duplicates may be somewhat easy to remove by sorting on Added. The new copies (which aren't on Playlists) would all have the same recent date.
[/quote]
Oh man. That would have been the most obvious thing to do. I did spot it adding all the files for a third time btw, so I think I'm best off with the fresh start.

The Duplicates may be somewhat easy to remove by sorting on Added. The new copies (which aren't on Playlists) would all have the same recent date.

Well, I'm back to only one copy. Unfortunately I went the wrong way about it. I removed ALL music from the library, knowing that it would be re-scanned (just once) on a restart of MM. I was right, it definitely did that. What I didn't expect is that it would destroy my playlists. They're all empty. I thought it might have just left them alone but no, removing music from the library automatically removes it from all playlists. Oh well, live and learn.

I could try and restore the playlists from a backup of the DB file from my daily backups, but that would probably restore the duplicates too :-(

Rebuilding the playlists manually now.

Hi d4005,

In this case, I would take a backup copy of your MM.DB file:

https://www.mediamonkey.com/support/knowledge-base/mediamonkey-install-config/modifying-the-mediamonkey-db-and-ini-files/

Then run the Add / Rescan files - does this fix or change the "count"?

Take a look at:

https://www.mediamonkey.com/support/knowledge-base/mediamonkey-database/why-are-there-duplicates-in-the-library-and-how-to-fix/

Yeah, it shows the same in every single column for both versions of the file (same filename, path, media, type, etc).

Hi d4005,

Just to be sure, go to say the music node and select the Show Details under the View menu.

If you right click on the column title row a list of available columns will be displayed. Add Media / Type and Path. You can drag the columns to change the order. I like to have (left to right) Media then Type then Artist / Album Artist / Album / Disc / Track then Title but you choose your preference.

Are you still seeing the duplicates i.e. does it show the same Media and Path for the dups?

I recently had [url=https://www.mediamonkey.com/forum/viewtopic.php?t=101733]an issue[/url] where I had to use the Drive ID fix plugin, the result was that it fixed my bad drive id/paths but now have a duplicate of every single file in my library.

I've found [url=https://www.mediamonkey.com/sw/webhelp/frame/index.html?deletingduplicates.htm]this help item[/url] but I don't understand what it's saying. It starts with "In the Tree, go to the Library". I don't even know what that means. Also, it's from MM3 rather than MM4.

These are 100% duplicates, every single one of their properties is identical. I'm not sure how the add/rescan could have added them as new files, although it's bound to be related to that drive ID thing - but I can't see what field it is.