Ensuring One Contact Per Company in Clay Workspace

Hey team, how can I ensure that there is 1 contact added to each company (dont want multiple)? https://app.clay.com/workspaces/707903/workbooks/wb_0t2bw0b8XDkzqPzkgvv/tables/t_0t2bw51yKxpqoQCz3bJ/views/gv_0t2bw53jiUiwuCiTZEu