Go to https://beta.musicbrainz.org/recording/74df6277-36ea-4077-8a34-a3328760d0cb/edit
Enter a URL, select "recording studio", submit the form.

It says the relationship is deprecated, but doesn't stop you from submitting it and once you submit it, it doesn't reject it server-side either. There used to be a server-side check which would reject any attempt to add a new deprecated relationship, even if you attempted to get around it by not using JS.