In this situation, the artist added one track to a digital album over a year after the initial album release. Re-downloading the album from wherever you purchased it, gets you the new track.
Should this be a new release from the moment the track was added or should the original release be updated with the new track and an annotation?
Hi, welcome! This would be considered a new release from the date the track was added. The original release can be related to the new one with a “replaced by” relationship and the status of the original release can be changed to “Withdrawn”.