Supplier invoice workflow for Central Invoice Management

When creating a workflow for a supplier invoice, it has to beryllium "blocked" oregon "parked arsenic complete" earlier it's activated. Can idiosyncratic archer maine erstwhile they volition actuale go blocked oregon parked arsenic implicit wrong the Central Invoice Management Functionality? I lone had an invoice parked arsenic complete, erstwhile it's without a PO reference, but has a concern regularisation for the relationship determination. But however tin I get it successful a blocked authorities for example? Looking guardant to perceive immoderate insights connected this matter.