Cannot present nested annotations unless created by this class

@RooJavaBean
@RooToString
@RooJson
@RooJpaActiveRecord(versionField = "", table = "cmp_connector")
@RooDbManaged(automaticallyDelete = true)
public class CmpConnector implements Component<CnfCnnValue> {

    @ManyToOne
    @JoinColumn(name = "FK_PARENT", referencedColumnName = "CNN_ID", insertable = true, updatable = true)
    private com.logica.soa.ui.model.database.CmpConnector fkParent;

    @Column(name = "NAME", columnDefinition = "VARCHAR", length = 255)
    @NotNull
    @NotBlank
    private String name;

    @OneToMany(mappedBy = "fkCnn", cascade = CascadeType.ALL)
    @OrderBy("cnnValId")
    private Set<CnfCnnValue> cnfCnnValues;

    /** method are defined */
}

@RooJavaBean
@RooToString
@RooJpaActiveRecord(versionField = "", table = "usr_group")
@RooDbManaged(automaticallyDelete = true)
public class UsrGroup {

    @Column(name = "NAME", columnDefinition = "VARCHAR", length = 45)
    @NotNull
    @NotEmpty
    private String name;
    
    @ManyToMany(mappedBy = "usrGroups", cascade = CascadeType.REFRESH)
    private Set<UsrUser> usrUsers;
    /** no additional code */

}