@Entity
@Table(name = "label")
public class Label {
    @Column(name = "tenant_id")
    private String tenant_id;

    @Column(name = "label_id")
    private String label_id;

    @JsonIgnore
    @ManyToMany(targetEntity = Report.class, cascade = { CascadeType.PERSIST, CascadeType.MERGE })
    @JoinTable(name = "tagging", joinColumns = @JoinColumn(name = "label_id"), inverseJoinColumns = @JoinColumn(name = "report_id"))
    private Set<Report> reports;
}

@Entity
@Table(name = "report")
public class Report {
    @Column(name = "tenant_id")
    private String tenant_id;

    @Column(name = "report_id")
    private String report_id;

    @column(name = "created_by")
    private String created_by;

    @JsonIgnore
    @ManyToMany(targetEntity = Label.class, cascade = { CascadeType.PERSIST, CascadeType.MERGE })
    @JoinTable(name = "tagging", joinColumns = @JoinColumn(name = "report_id"), inverseJoinColumns = @JoinColumn(name = "label_id"))
    private Set<Label> labels;

}