I found that date only in a digital download, so it may be just an encoding of one of the previous from 1990. They had at least these names:
- John Williams Conducts Music From The Star Wars Saga
- John Williams Conducts Music From The Star Wars Trilogy (shown in a very similar front cover)
- Star Wars: The Best Of Space Music
They have the same tracklist: Release group "John Williams Conducts Music From the Star Wars Saga" by John Williams & The Boston Pops Orchestra - MusicBrainz (
http://musicbrainz.org/release-group/133fd48e-7ed3-3730-826d-8d3ad50ed56c)