Best practice for using @Column and @JoinColumn for same field

Question

I've got two different scenarios where I have to retrieve data from one or two entities that have a relation between them.

@Entity
@Table
public class Level2 {
    @Id
    @Column(name = "id_level_2")
    private Integer idLevel2;

    @Column(name = "id_level_1")
    private Integer idLevel1;

    @ManyToOne
    @JoinColumn(name = "id_level_1", referencedColumnName = "id_level_1", insertable =  false, updatable = false)
    private Level1 level1;

Case A) Just want to retrieve de level2 without Level1 information, just the two ids. Case B) All the Level2 with the Level1 information.

This works but I am wondering if it is a good practice.

Thanks