diff --git a/routers/repo/cloudbrain_statistic.go b/routers/repo/cloudbrain_statistic.go
index 2ec12cd41..e412eb2db 100644
--- a/routers/repo/cloudbrain_statistic.go
+++ b/routers/repo/cloudbrain_statistic.go
@@ -26,9 +26,8 @@ func CloudbrainDurationStatisticHour() {
 	} else {
 		statisticTime = currentTime
 	}
-	deleteBeginTime := time.Unix(int64(recordDurationUpdateTime[0].DateTime), 0)
 
-	err = models.DeleteCloudbrainDurationStatistic(timeutil.TimeStamp(deleteBeginTime.Unix()), timeutil.TimeStamp(currentTime.Unix()))
+	err = models.DeleteCloudbrainDurationStatistic(timeutil.TimeStamp(statisticTime.Unix()), timeutil.TimeStamp(currentTime.Unix()))
 	if err != nil {
 		log.Error("DeleteCloudbrainDurationStatistic failed", err)
 	}