minor fix

shipment.py

@@ -442,7 +442,7 @@ class ShipmentDetailedReport(Report):
         fields_names = [
             'product.account_category.name', 'product.name', 'product.cost_price',
             'quantity', 'to_location.name', 'from_location.name', 'shipment.reference',
-            'effective_date'
+            'effective_date', 'shipment.number'
         ]
         fields = ModelShipment.fields_get(fields_names=['operation_center', 'customer', 'supplier', 'incoming_moves'])
         if 'operation_center' in fields.keys():