I am using Hibernate Envers with entity

```
@Entity
@Table(name = "users", schema = "core")
@Audited public class Users implements java.io.Serializable, Comparable<Users> {
    protected static final long serialVersionUID = 1250157348010696249L;    
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Basic(optional = false)
    @Column(name = "userid")
    protected Integer userId;

    @Column(name = "aduserid")
    protected String aduserId;

    @Column(name = "firstname")
    protected String firstName;

    @Column(name = "middlename")

```

i am getting error hibernate sequence does not exist .

when i am changing false
then it says revision generator does not exist.
Pls help me.