There are legacy releases such as the "Project Volume 1" audio cassettes which compile various tracks and remixes, often categorized by collectors using serial codes like 001.
A prominent 4K version of "Why" was arranged by composer Igor Gorelov. In digital archives or personal collections, such files are often indexed as "0001" to denote the first entry in a specific project or cover series. Enigma why cover 0001
While "0001" is not a standard part of Enigma's official discography numbering, it appears in specific modern contexts: There are legacy releases such as the "Project