Form Validator Detach

Vaadin 6 / 7 / 8 Framework UI
1

I have a question regarding form validator

I use form field factory to attach my field(s)

public class RoleAddFieldFactory extends DefaultFieldFactory {

	private static final long serialVersionUID = -6699579892309818723L;

	private static final String COMMON_FIELD_WIDTH = "12em";

	public RoleAddFieldFactory() {

	}

	@Override
	public Field createField(Item item, Object propertyId, Component uiContext) {
		Field f;

		f = super.createField(item, propertyId, uiContext);

		if (RoleAddFormComplexLayout.ROLECODE_PROPERTY_NAME.equals(propertyId)) {
			TextField tf = (TextField) f;
			tf.setCaption("Kod Peranan");
			tf.setRequired(true);
			tf.setRequiredError("Sila masukkan kod peranan");
			tf.setWidth(COMMON_FIELD_WIDTH);
			tf.setMaxLength(EntityConstant.Role.ROLE_CODE_LENGTH);
			tf.addValidator(new KodPerananValidator("Data already exist"));
			tf.setWriteThrough(true);
		} else if (RoleAddFormComplexLayout.ROLENAME_PROPERTY_NAME.equals(propertyId)) {
			TextField tf = (TextField) f;
			tf.setCaption("Nama Peranan");
			tf.setRequired(true);
			tf.setRequiredError("Sila masukkan nama peranan");
			tf.setWidth(COMMON_FIELD_WIDTH);
			tf.setMaxLength(EntityConstant.Role.ROLE_DESCRIPTION_LENGTH);
		}

		return f;
	}

}

Once i submit the form and all the validation is success, once the form loaded back it will display an exclamination mark for ROLECODE_PROPERTY_NAME field.
Is there anyway once i submit the form, i would be able to detach any validator link to that field.