Issue

• An association is declared between Member and Address using FetchType.LAZY

public class Member implements Serializable {
    @Id
    @GeneratedValue
    private Long id;
    ...
    @ManyToMany(fetch=FetchType.LAZY, targetEntity=Address.class)
    @JoinTable(name="tbl_member_address",
                joinColumns = @JoinColumn(name="member_id"),
                inverseJoinColumns = @JoinColumn(name="address_id")
    )
    private List<Address> addresses = new ArrayList<Address>();

• An instance of Member is instantiated using the ID of an existing entity
• After modifying various properties (not including the association property), the new instance is merged using the EntityManager
• The association between the Member and Address entities is severed (the association rows are deleted from the tbl_member_address table)