sales document item is not defined for this transaction in Pur.Order

hi,

At the time of convertion of pr to po one error message received.

Sales document item 46 000010 is not defined for the transaction

Message no. V1198

Diagnosis

You have tried to carry out a business transaction for this sales and distribution document item which, for this item, is not allowed.

This may be due to the fact that this item is not part of a make-to-order production with cost management in the sales order.

Procedure

Please check your entries.

this is MAKE TO ORDER SCENARIO THIS ERROR IS FOR RAW MATERIAL CONVERTION AGAINST SALES ORDER.