"... but none of those versions made the final cut for the album and the song remained in Columbia's vault for the past 43 years. The track never even leaked onto bootlegs, but on August 27th, it's finally coming out on Another Self Portrait, a 35-track box set of songs cut for Nashville Skyline, Self Portrait and New Morning."
Details and video of the song here.
Here's the old "Self Portrait." "Another Self Portrait" will come out at the end of the month.