Interesting story!
(not sure if the website will link, I do not get a preview, hopefully it comes though)
https://www.telegraph.co.uk/music/artists/david-bowie-lost-recording-found-young-americans/
-OR-
From the article:
When Ochester told him that he had a studio tape from the Young Americans sessions, Levinson immediately assumed it was a back-up copy, or ‘safety’, of tapes that were already known about. Asked why he jumped to this conclusion, Levinson says, ‘Because the likelihood of finding original, unreleased David Bowie studio recordings, that no one has ever heard before, from 50 years ago, is almost zero.’