Hibernate身份生成器问题

org.hibernate.NonUniqueObjectException .

附件1-->网址
{STRAPApplicationID:1;URLTypeEntity{strCode:1,strDescription:Reply},strURL:www.address1.com},
{STRAPApplicationID:1;URLTypeEntity{strCode:1,strDescription:Reply},strURL:www.address2.com},
{STRAPApplicationID:1;URLTypeEntity{strCode:2,strDescription:Home},strURL:www.address3.com}

如果集合中没有两个URL具有相同的URLTypeEntity,则不会触发错误

@Entity
@Table(name = "tbl_urls")
public class URLEntity
{
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name="intCode")
    private Integer intCode;
    private String strApplicationID;
    @OneToOne(cascade = CascadeType.ALL)
    @JoinColumn(name = "intType", referencedColumnName = "intCode")
    private URLTypeEntity objURLType;
    private String strURL;
}
@Entity
@Table(name = "tbl_applications")
public class ApplicationEntity
{
    @OneToMany(cascade = CascadeType.ALL, mappedBy = "strApplicationID")
    private List<URLEntity> colURLs;
}