Message V1134 Account Assignment cannot be carried out because of different origin

Hi Friends

We are in the Make to Order scenario with special stock (but Sales Order is not a cost object).

We are now doing a make to stock material transfer to a Sales Order item and the system is issuing error message :

"Message V1134 Account Assignment cannot be carried out because of different origin-Stock Transfer"

We use the requirement type KEL and requirement Class 047. The account assignment category is 'M'.

We are in ECC6.

Please help to resolve this issue.