SAP Message AG004 - Sales order item number not specified in requirement

Diagnosis
A requirement with the special procurement indicator 'make-to-orderproduction' has been transferred to the availability check. Therequirement must, however, contain the number of the respective salesorder item. This is not the case.

710123BAPI_ALM_ORDER_MAINTAIN: No WBS element or sales order
318250Incor transf of fields changed by configuration to doc