Please have a look at this page:
In the category “Album + Live” you see two release groups:
The second release group does not contain any release.
The second release-group title “Live at Wacken 2007” (without release year) indicates, that this release was part of the first release group “Visual Karma (Body, Mind and Soul): Live at Wacken 2007”
Should I delete the second release-group?
Or should I merge them?