diff --git a/public/pages/DefineDetector/components/CustomResultIndex/CustomResultIndex.tsx b/public/pages/DefineDetector/components/CustomResultIndex/CustomResultIndex.tsx
index 9c0693c7..c5b6447b 100644
--- a/public/pages/DefineDetector/components/CustomResultIndex/CustomResultIndex.tsx
+++ b/public/pages/DefineDetector/components/CustomResultIndex/CustomResultIndex.tsx
@@ -99,7 +99,7 @@ function CustomResultIndex(props: CustomResultIndexProps) {
                 disabled={props.isEdit}
                 onChange={() => {
                   if (enabled) {
-                    form.setFieldValue('resultIndex', '');
+                    form.setFieldValue('resultIndex', undefined);
                   }
                   setEnabled(!enabled);
                 }}
diff --git a/public/redux/reducers/ad.ts b/public/redux/reducers/ad.ts
index 3fa06ad3..5f6bbaa7 100644
--- a/public/redux/reducers/ad.ts
+++ b/public/redux/reducers/ad.ts
@@ -493,10 +493,8 @@ export const startHistoricalDetector = (
   startTime: number,
   endTime: number
 ): APIAction => {
-  const baseUrl = `..${AD_NODE_API.DETECTOR}/${detectorId}`;
-  const url = dataSourceId
-    ? `${baseUrl}/${dataSourceId}/start`
-    : `${baseUrl}/start`;
+  const baseUrl = `..${AD_NODE_API.DETECTOR}/${detectorId}/start`;
+  const url = dataSourceId ? `${baseUrl}/${dataSourceId}` : baseUrl;
 
   return {
     type: START_HISTORICAL_DETECTOR,