diff --git a/src/controllers/07-task-controller.ts b/src/controllers/07-task-controller.ts
index dfb9ced..6e22f77 100644
--- a/src/controllers/07-task-controller.ts
+++ b/src/controllers/07-task-controller.ts
@@ -390,7 +390,12 @@ export class TaskController extends Controller {
               ),
           ),
           createMany: {
-            data: body.taskList,
+            data: body.taskList.filter(
+              (lhs) =>
+                !record?.taskList.find(
+                  (rhs) => lhs.requestWorkId === rhs.requestWorkId && lhs.step === rhs.step,
+                ),
+            ),
             skipDuplicates: true,
           },
         },