diff --git a/server/AyaNova/biz/WorkOrderBiz.cs b/server/AyaNova/biz/WorkOrderBiz.cs
index 7892928d..4396222b 100644
--- a/server/AyaNova/biz/WorkOrderBiz.cs
+++ b/server/AyaNova/biz/WorkOrderBiz.cs
@@ -1324,7 +1324,7 @@ namespace AyaNova.Biz
                 foreach (long ItemId in UnitIds)
                     if (!await UnitDeleteAsync(ItemId, transaction))
                         return false;
-                foreach (long ItemId in UnitIds)
+                foreach (long ItemId in OutsideServiceIds)
                     if (!await OutsideServiceDeleteAsync(ItemId, transaction))
                         return false;