diff --git a/pkg/monitor/models/unifiedmonitor.go b/pkg/monitor/models/unifiedmonitor.go
index 9c2e72ba4a..432f297bd7 100644
--- a/pkg/monitor/models/unifiedmonitor.go
+++ b/pkg/monitor/models/unifiedmonitor.go
@@ -407,9 +407,6 @@ func checkQueryGroupBy(query *monitor.AlertQuery, inputQuery *monitor.MetricInpu
 	if len(query.Model.GroupBy) != 0 {
 		return
 	}
-	if inputQuery.Unit {
-		return
-	}
 	if query.Model.Database == monitor.METRIC_DATABASE_METER && inputQuery.Unit {
 		return
 	}