@OneToOne(fetch = FetchType.LAZY)
    @JoinTable(
        name = "ITEM_SHIPMENT", // Required!
        joinColumns =
            @JoinColumn(name = "SHIPMENT_ID"),  // Defaults to ID
        inverseJoinColumns =
            @JoinColumn(name = "ITEM_ID",  // Defaults to AUCTION_ID
                        nullable = false,
                        unique = true)
    )
    protected Item auction;