diff --git a/video-gen-api/app/services/invoice.py b/video-gen-api/app/services/invoice.py
index 8164519c..8c88abb7 100644
--- a/video-gen-api/app/services/invoice.py
+++ b/video-gen-api/app/services/invoice.py
@@ -88,10 +88,7 @@ async def create_invoice(
     # 2. 检查订单唯一性
     occupied = await check_orders_available(db, data.order_ids)
     if occupied:
-        details = "; ".join(
-            f"订单 {o['order_no']} 已被发票 {o['invoice_no']} 占用"
-            for o in occupied
-        )
+        details = f"订单 {order.order_no} 未支付，无法开票",
         raise HTTPException(
             status_code=status.HTTP_409_CONFLICT,
             detail=details,