diff --git a/rds_mysql/stored_procedure/internal02/crm_history.sql b/rds_mysql/stored_procedure/internal02/crm_history.sql
index 5607741d..156d61f7 100644
--- a/rds_mysql/stored_procedure/internal02/crm_history.sql
+++ b/rds_mysql/stored_procedure/internal02/crm_history.sql
@@ -52,7 +52,7 @@ BEGIN
 		CREATE TEMPORARY TABLE $$target_table$$_make_history_tmp 
 		SELECT
 			Id
-			, MIN($$target_column$$) AS min_start_datetime
+			, MIN($$target_column$$) AS min_systemmodstamp
 			, MAX(start_datetime) AS max_start_datetime 
 		FROM
 			$$target_table$$ 
@@ -74,7 +74,7 @@ BEGIN
 		UPDATE $$target_table$$ tt 
 			INNER JOIN $$target_table$$_make_history_tmp mht 
 				ON tt.Id = mht.Id 
-				AND tt.start_datetime = mht.min_start_datetime 
+				AND tt.$$target_column$$ = mht.min_systemmodstamp 
 		SET
 			end_datetime = mht.max_start_datetime - INTERVAL 1 SECOND 
 			, upd_user = CURRENT_USER()