diff --git a/B03_FileInput/B03_FileInput_UI_Page.ts b/B03_FileInput/B03_FileInput_UI_Page.ts
index b7ee750c..be036522 100644
--- a/B03_FileInput/B03_FileInput_UI_Page.ts
+++ b/B03_FileInput/B03_FileInput_UI_Page.ts
@@ -566,6 +566,12 @@ export async function renderB03FileInput(root: HTMLElement): Promise<void> {
       renderUploadResults(resultList, uploaded);
       showToast(L("B03_File_Upload_Success"), "success");
 
+      // 모든 파일이 기존 파일과 같으면 새 분석이 시작되지 않는다.
+      if (uploaded.length === 0) {
+        navigateTo(completionRoute);
+        return;
+      }
+
       showToast(L("B03_File_Analysis_InProgress"), "info");
       const analysisComplete = await pollAnalysis(activeProjectId);