a few days ago, I added the entire server to Erica's iTunes list.
6200 extra songs.
Because the server was down for a day, it cycled through and marked all of them missing.
The fix is to manually, individually Get Info on each song. There's no batch tool.
So then, she could add each song from the duplicates list to a DELETEME genre.
Then she could delete the DELETEME genre.
She completed this, by hand, over the last week.
And then I remembered.
We back up our laptops and we should have just restored her iTunes database.