diff --git a/src/pages/Competitions/Detail/components/WorkSubmit/index.tsx b/src/pages/Competitions/Detail/components/WorkSubmit/index.tsx
index b5998007f..d4c5b04a9 100644
--- a/src/pages/Competitions/Detail/components/WorkSubmit/index.tsx
+++ b/src/pages/Competitions/Detail/components/WorkSubmit/index.tsx
@@ -307,7 +307,8 @@ const WorkSubmit: FC<PageProps> = ({
             Data["name"] = values.name;
             Data["url"] = values.url;
         }
-        if (modelType == 1 && fileList.length == 0) {
+        const hasNewFile = fileList[0] instanceof File;
+        if ((modelType == 1 && (fileList.length == 0 || !hasNewFile)) || (modelType == 2 && !hasNewFile)) {
             res = await dispatch({
                 type: 'competitions/getWorkSubmitUpdateRes',
                 payload: {
diff --git a/src/utils/fetch.ts b/src/utils/fetch.ts
index 8988c535c..07fb0b625 100755
--- a/src/utils/fetch.ts
+++ b/src/utils/fetch.ts
@@ -126,8 +126,8 @@ export default function request(url: string, option: any, flag?: boolean) {
 
   let newOptions = { ...defaultOptions, ...options }
   let eduHeader = {
-    'X-Edu-Signature':'d8f677f925d3ce1427e7d917660661ce',
-    'X-Edu-Timestamp':'1783058819780',
+    'X-Edu-Signature':'543a093f1c514959673a0cc5af80bde5',
+    'X-Edu-Timestamp':'1784017604961',
     'X-Edu-Type':'pc',
   }