My recommendation: Restore the test_po_records, test_supplier_records, and payroll_holds fixtures from the May 13 18:00 backup (taken before the refresh). Notify the finance regression team to expect a 30-minute delay. Open a change-control ticket to add the fixture-protection runbook to the Workday refresh schedule.
I have drafted the restore plan, the notification to finance, and the CR ticket to fix the runbook. All await your one-click confirmation. I will not execute the restore myself — that goes through your Workday admin team per change-control policy.