Since breaking the conflict on the 4XX requires less BFM, I believe that is preferable.
University of Washington Libraries
When we are establishing a new NAR and discover that our 1xx conflicts with a 4xx on another record, is it better to add a qualifier to the 1xx on the new NAR, or to add retrospectively a qualifier to the old 4xx? I have a sense that the latter is the preferable solution but Iím not 100 percent certain.
Acquisitions & Discovery Enhancement