Hi there!
Oh, my bad (or more specifically the Android on-screen-keyboard + auto-completion + my fingers combo).

The "ref:DK:cvr" key is correct, but the "ref:DK:cvr:" misses a "pnummer" suffix to be a "produktionsenhedsnummer" tag (https://wiki.openstreetmap.org/wiki/Key:ref:DK:cvr:pnummer).

Refer to the CVR source registration for the entity providing both numbers at https://datacvr.virk.dk/enhed/produktionsenhed/1022357472.

I have just fixed this in CS https://www.openstreetmap.org/changeset/169453774.

Thanks for the attention ;).