diff --git a/kca/6.91/prod/ping.json b/kca/6.91/prod/ping.json
index b54367c01..7b2ba3726 100644
--- a/kca/6.91/prod/ping.json
+++ b/kca/6.91/prod/ping.json
@@ -33,8 +33,8 @@
     ],
     "ngri_lst_lut": "2023-03-14T04:23:54+09:00",
     "db_close_timestamp": [
-        "2023-03-14T02:00:00+09:00",
-        "2023-03-14T07:00:00+09:00"
+        "2023-03-21T02:00:00+09:00",
+        "2023-03-21T07:00:00+09:00"
     ],
     "req_inv_cmd_prm3": [
         -1,