ShipmentItem BoxType and CarrierShipment technical constraint : association must be aggregation but not usable with 3 PK !! Shipment Ofbiz entities not used shipmentMethodTypeId carrierPartyId and carrierRoleTyleId are CarrierShipmentMethod PK not generable ! Can't draw assoc with ShipmentPackage because two time shipment There is only one event active per ShipmentBox