Header data (VBAK- OID_MISCDL) is not copied to order items (VBAP-OID_MISCD

Hi Team

When I create an order with reference to another document then header data (VBAK- OID_MISCDL) is not copied into the sales order items (VBAP-OID_MISCDL) for all the copied items. But if I add a new item to this order then the value of VBAK- OID_MISCDL is copied into the new item (VBAP-OID_MISCDL) only.

Also if I create an order without any reference document then value of VBAK- OID_MISCDL is copied into the sales order item(VBAP-OID_MISCDL) if the header data VBAK- OID_MISCDL is entered before line items are added to the order.

Thanks for your help

Javed