This question is about this release-group: Release group “Legacy of the Dark Lands” by Blind Guardian Twilight Orchestra - MusicBrainz
The group contains two albums with no barcode and an odd catalog number.
https://musicbrainz.org/release/dc877503-14a6-4bf6-aa3a-a42edc96bb5b and https://musicbrainz.org/release/c27fe987-8ddc-46ce-9436-53a83338025a
A Google search shows that these were the SKUs of the albums in Nuclear Blast’s online store.
Are the catalog and SKU treated as the same or should the releases have their catalog removed and merged with the proper ones?
https://musicbrainz.org/release/876e371d-6198-4d38-8e77-bebb56c9ebf4 and https://musicbrainz.org/release/f02c2ba4-9e65-4231-aed1-4257fab8d1c0