diff --git a/src/controllers/07-task-controller.ts b/src/controllers/07-task-controller.ts
index cf7b402..02def1e 100644
--- a/src/controllers/07-task-controller.ts
+++ b/src/controllers/07-task-controller.ts
@@ -265,7 +265,7 @@ export class TaskController extends Controller {
       taskProduct?: { productId: string; discount?: number }[];
     },
   ) {
-    if (!body.taskList || !body.registeredBranchId)
+    if (body.taskList.length < 1 || !body.registeredBranchId)
       throw new HttpError(
         HttpStatus.BAD_REQUEST,
         "Your created invalid task order",
@@ -318,8 +318,8 @@ export class TaskController extends Controller {
       });
 
       if (updated.count !== taskList.length) {
-        throw new httperror(
-          httpstatus.precondition_failed,
+        throw new HttpError(
+          HttpStatus.PRECONDITION_FAILED,
           "all request work to issue task order must be in ready state.",
           "requestworkmustready",
         );