Problema com valor gerado da sequence- PostgreSQL + Hibernate Annotation

CREATE SEQUENCE usuario_id_seq
  INCREMENT 1
  MINVALUE 1
  MAXVALUE 9223372036854775807
  START 2
  CACHE 1;

public class Usuario implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @Basic(optional = false)
    @Column(name = "id")
    @GeneratedValue(generator="id",strategy=GenerationType.SEQUENCE)
    @SequenceGenerator(name="id",sequenceName="usuario_id_seq")
    private Integer id;
    
    .......

}