diff --git a/solarApp/Service/archiveLowData.cs b/solarApp/Service/archiveLowData.cs
index 289816f..626af20 100644
--- a/solarApp/Service/archiveLowData.cs
+++ b/solarApp/Service/archiveLowData.cs
@@ -42,7 +42,7 @@ namespace solarApp.Service
                // string yyyymm = System.DateTime.Now.AddMonths(-2).ToString("yyyy-MM");
                 _siteID = siteID;
             //搬移的月份
-             move_month = System.DateTime.Now.AddMonths(-2).ToString("yyyy-MM")+ "--01";
+             move_month = System.DateTime.Now.AddMonths(-1).ToString("yyyy-MM")+ "-01";
             // move_month = System.DateTime.Now.ToString("yyyy-MM") + "--01"; //這個月
             //_date1 = date1;
             get_siteInfo();