Clicking "Use this in a relationship" on a recording and work in the wrong order got me into this state: http://test.musicbrainz.org/edit/relationship/create?type1=recording&entity1=789ef8ed-be59-4c7f-9e85-dd84408dcb07&entity0=5302baa6-3ad8-4d4e-ae3d-18a75594b4fc&type0=work

There are no relationships I can create, nor can I switch the direction except for restarting or modifying the URL. I'd expect a switch button much like in the current UI.