When we add a medium by means of MB Picard, a Disc ID is added automatically. But is this medium is a CD-R, the Disc ID should not be added. Now we have to remove next this Disc ID, and this edit (Remove Disc ID) is subject to 14-day term, to vote, etc., e.g.:
http://musicbrainz.org/release-group/e6e9fa06-728d-45f3-a498-9bacb878c617/edits
It would be useful to choose "Add / Not add Disc ID" when we submit a medium by means of MB Picard. I have a lot of CD-copies (CD-R) to add, and I use Picard for avoid to fill manually the tracks' count and lengths.