SAP Message /SAPBOQ/SRVPACK034 - Record &1, SERVICES: assigned service line is not a main item

Diagnosis
The data record &V1& is a subitem (object category U).
The value for MI_LINE_NO is invalid. The assigned service line numberdoes not relate to a main item because the object category is not M
.

Procedure
Each subitem must be assigned to a main item.
For data record &V1&, enter a valid value for MI_LINE_NO in theparameter SERVICES. Check whether the object category of the serviceline to be assigned is M for a main item.