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Someone please help me out to update DDM field value programmatically below is the code I am using.
import com.liferay.dynamic.data.lists.model.DDLRecord;
import com.liferay.dynamic.data.lists.model.DDLRecordConstants;
import com.liferay.dynamic.data.lists.model.DDLRecordSet;
import com.liferay.dynamic.data.lists.service.DDLRecordLocalServiceUtil;
import com.liferay.dynamic.data.lists.service.DDLRecordSetLocalServiceUtil;
import com.liferay.dynamic.data.mapping.model.DDMStructure;
import com.liferay.dynamic.data.mapping.storage.Fields;
import com.liferay.dynamic.data.mapping.util.DDMUtil;
import com.liferay.portal.kernel.exception.PortalException;
import com.liferay.portal.kernel.json.JSONArray;
import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;
import com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet;
import com.liferay.portal.kernel.service.ServiceContext;
import com.liferay.portal.kernel.service.ServiceContextFactory;
import com.liferay.portal.kernel.theme.ThemeDisplay;
import com.liferay.portal.kernel.upload.UploadPortletRequest;
import com.liferay.portal.kernel.util.GetterUtil;
import com.liferay.portal.kernel.util.ParamUtil;
import com.liferay.portal.kernel.util.PortalUtil;
import com.liferay.portal.kernel.util.StringPool;
import com.liferay.portal.kernel.util.StringUtil;
import com.liferay.portal.kernel.util.Validator;
import com.liferay.portal.kernel.util.WebKeys;

@Component(
    immediate = true,
    property = {
        "com.liferay.portlet.display-category=FordFleetCare",
        "com.liferay.portlet.instanceable=false",
        "javax.portlet.display-name=FordFleetCareForms",
        "javax.portlet.name=FordFleetCareForms",
        "javax.portlet.init-param.template-path=/",
        "javax.portlet.security-role-ref=power-user,user",
        "javax.portlet.init-param.view-template=/fordfleetcareforms/form.jsp"
        
    },
    service = Portlet.class
)
public class FormsPortlet extends MVCPortlet {

public void addDetails(ActionRequest actionRequest, ActionResponse response)
            throws IOException, PortletException, PortalException {
        UploadPortletRequest uploadPortletRequest =
                        PortalUtil.getUploadPortletRequest(actionRequest);
        ThemeDisplay themeDisplay =(ThemeDisplay) actionRequest.getAttribute(WebKeys.THEME_DISPLAY);        long recordSetId =
                        ParamUtil.getLong(
                            uploadPortletRequest, "recordSetId");
        String storeDataLocally = ParamUtil.getString(uploadPortletRequest, "storeData");        LOGGER.info("RECORD SET ID >>" + recordSetId);
        LOGGER.info("STORE DATE LOCALLY >>" + storeDataLocally);        long groupId = themeDisplay.getScopeGroupId();
        ServiceContext serviceContext = ServiceContextFactory.getInstance(
            DDLRecord.class.getName(), uploadPortletRequest);
        try {
            DDLRecordSet ddlRecordSet=DDLRecordSetLocalServiceUtil.getDDLRecordSet(recordSetId);
            DDMStructure ddmStructure =ddlRecordSet.getDDMStructure();
            Fields fields = DDMUtil.getFields(ddmStructure.getStructureId(), serviceContext);
            List<String> rootFields = ddmStructure.getRootFieldNames();
            for(String rootField : rootFields){
                String type= ddmStructure.getFieldType(rootField);
                String value =ParamUtil.getString(uploadPortletRequest, rootField);
                LOGGER.info("FIELD NAME : "+rootField);
                LOGGER.info("FIELD TYPE : "+type);
                LOGGER.info("FIELD VALUE : "+value);
                if(type.toLowerCase().contains("date")){
                    fields.get(rootField).addValue(themeDisplay.getLocale(),new java.util.Date(value));
                }
               else if( type.toLowerCase().contains("radio")) {
                        try {
                            fields.get(rootField).addValue(themeDisplay.getLocale(), ddmStructure.getDDMFormField(rootField).getDDMFormFieldOptions().getOptions().get(0));
                        }catch(Exception e) {
                            LOGGER.error("ERROR ** ",e);
                        }
                        LOGGER.info("FIELD RADIO VALUES : "+value);
                    
                }else{
                          fields.get(rootField).addValue(themeDisplay.getLocale(),value);                 }
            }
            DDLRecordLocalServiceUtil.addRecord(themeDisplay.getUserId(),groupId, recordSetId, DDLRecordConstants.DISPLAY_INDEX_DEFAULT, fields, serviceContext);
        }catch(Exception e) {
            LOGGER.error("ERROR ** ",e);
        }
        
            }private static final Log LOGGER=LogFactoryUtil.getLog(FormsPortlet.class.getName());
}

I am getting below errors.
1. On the date field, I am getting an unparsable date from date.ftl file.
2.  On the radio button field, I am getting "com.liferay.dynamic.data.mapping.form.field.type.DDMFormFieldValueValidationException: The selected option "option2" is not a valid alternative"
@liferay team please help me out on the above issue.