diff --git a/apps/wpmw/views.py b/apps/wpmw/views.py
index 44ee097f..4350a7b4 100644
--- a/apps/wpmw/views.py
+++ b/apps/wpmw/views.py
@@ -74,6 +74,10 @@ class WprViewSet(CustomListModelMixin, RetrieveModelMixin, ComplexQueryMixin, Cu
             number_outs.sort()
             number_out_last = number_outs[-1]
             number_int_last = number_out_last.lstrip(prefix).lstrip('0')
+            try:
+                number_int_last = int(number_int_last)
+            except ValueError:
+                raise ParseError(f"找到 {number_int_last}, 请检查前缀格式")
             return Response({"number_out_last": number_out_last, "number_out_int_last": int(number_int_last)})
         else:
             return Response({"number_out_last": None})