diff --git a/src/components/production/WorkOrders/actions.ts b/src/components/production/WorkOrders/actions.ts
index 05b5c4fc..732e0606 100644
--- a/src/components/production/WorkOrders/actions.ts
+++ b/src/components/production/WorkOrders/actions.ts
@@ -213,7 +213,7 @@ export async function getWorkOrderById(id: string): Promise<{
 
 // ===== 작업지시 등록 =====
 export async function createWorkOrder(
-  data: Partial<WorkOrder> & {
+  data: Omit<Partial<WorkOrder>, 'items'> & {
     salesOrderId?: number;
     assigneeId?: number;      // 단일 담당자 (하위 호환)
     assigneeIds?: number[];   // 다중 담당자
@@ -235,12 +235,13 @@ export async function createWorkOrder(
         ? [data.assigneeId]
         : undefined;
 
+    const { items: manualItems, ...restData } = data;
     const apiData = {
-      ...transformFrontendToApi(data),
+      ...transformFrontendToApi(restData),
       sales_order_id: data.salesOrderId,
       assignee_ids: assigneeIds,  // 배열로 전송
       team_id: data.teamId,
-      ...(data.items && data.items.length > 0 ? { items: data.items } : {}),
+      ...(manualItems && manualItems.length > 0 ? { items: manualItems } : {}),
     };