SAP Message 29149 - Material group & different from material group & in material master

Diagnosis
In a non-stock item, you are maintaining the LS>Material group fieldunder purchasing data.
In the material master, the value &V2& was entered in this field. Youhave either overwritten this value with the entry &V1& or made a newentry, if the BOM was allocated to more than one plant.
Please note that this value is required for the purchase requisition.