Medium (CD) starts at 2 rather than 1

The release Rock - Road Trip - The Ultimate Collection consists of five CDs. However, they are numbered 2–6 rather than 1–5. Is there any way to change that? I tried adding new mediums and changing the order, but that does not help.


Strange thing. I was able to correct the numbering by moving all one up (literally clicking the “up” button on the first disc changed the number from 2 to 1), see Edit #81008883 - MusicBrainz

I think this happened because originally someone submitted a single medium with all tracks, see . Then the discs where additionally added as 5 separate mediums, afterwards the original add medium edit failed and left the release with that hole at the beginning.