Attempted to change the release medium from DVD to CD for [1].

The edit summary page showed two changes,

1) A change in artist both from and to [2]
2) The change in release medium

and entering this created two corresponding edits,

1) Edit #14460563
2) Edit #14460564

The second of these is exactly as expected, but the first is surely spurious.

[1] http://ngs.musicbrainz.org/release/2fb39b27-3d3a-31b1-9d7f-a5801ea4f170
[2] http://ngs.musicbrainz.org/artist/550ac122-4a03-4711-a5ef-3204286e7583