Using same parent table id on daughter - Hibernate

I'm having trouble configuring and handling the use of ID in parent / child classes using Hibernate . I get everything working correctly when the record does not exist in the parent table (records are created with% correct% of the parent and child tables), but when the record exists in the parent table and I need to insert it only into the child, a new id It is created. I need IDs to stay the same in both tables

Parent class :

==========================
@Entity
@Table(name = "FUNDOS" , schema = "LIMITE")
@Inheritance(strategy = InheritanceType.JOINED)
public class Fundo implements Comparable<Fundo>, FundoInterface {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    protected Integer id;   

======================

Daughter Class:

======================
@Entity
@Table(name = "BENCHMARKS" , schema = "LIMITE")
public class Benchmark extends Fundo {


    Benchmark() {
    }

    public Benchmark(Fundo fundo) {
        this.id = fundo.getId();
        this.nome = fundo.getNome();
        this.codigoX = fundo.getCodigoX();
        this.codigoY = fundo.getCodigoY();
    }

============

How to treat?

I have already tried to use reverse engineering to know what annotations id would generate from the tables already created ...