diff --git a/apps/wpmw/views.py b/apps/wpmw/views.py
index 12611df1..f02ad8b4 100644
--- a/apps/wpmw/views.py
+++ b/apps/wpmw/views.py
@@ -62,7 +62,9 @@ class WprViewSet(CustomListModelMixin, RetrieveModelMixin, ComplexQueryMixin, Cu
         
         获取最新的出库对外编号(get请求传入prefix参数和with_unsubmit参数，with_unsubmit默认为yes，表示是否包含未出库的记录，prefix为前缀，如'WPR-2023-0)"""
         from apps.inm.models import MIOItemw
-        prefix = request.query_params.get("prefix")
+        prefix = request.query_params.get("prefix", None)
+        if not prefix:
+            raise ParseError("请传入前缀参数")
         with_unsubmit = request.query_params.get("with_unsubmit", "yes")
         wpr_qs_last = Wpr.objects.filter(number_out__startswith=prefix).order_by("number_out").last()
         number_outs = []