If SOC Validation failures if we want us to reset the previous value?

If SOC Validation failures if we want us to reset the previous value?
this is the approach

This is at value change event:
                        RichSelectOneChoice choice = this.getSoc6();
                        choice.setValue("P");

                    RichSelectBooleanCheckbox box =this.getSbc1();
                    box.setValue("N");