diff --git a/internal/datacoord/index_service.go b/internal/datacoord/index_service.go
index 287f488f4e..fa95f0d9f1 100644
--- a/internal/datacoord/index_service.go
+++ b/internal/datacoord/index_service.go
@@ -61,10 +61,6 @@ func (s *Server) startIndexService(ctx context.Context) {
 }
 
 func (s *Server) createIndexForSegment(ctx context.Context, segment *SegmentInfo, indexID UniqueID) error {
-	if !segment.GetIsSorted() && Params.DataCoordCfg.EnableStatsTask.GetAsBool() && !segment.GetIsImporting() && segment.Level != datapb.SegmentLevel_L0 {
-		log.Info("segment not sorted, skip create index", zap.Int64("segmentID", segment.GetID()))
-		return nil
-	}
 	log.Info("create index for segment", zap.Int64("segmentID", segment.ID), zap.Int64("indexID", indexID))
 	buildID, err := s.allocator.AllocID(context.Background())
 	if err != nil {
@@ -89,7 +85,7 @@ func (s *Server) createIndexForSegment(ctx context.Context, segment *SegmentInfo
 }
 
 func (s *Server) createIndexesForSegment(ctx context.Context, segment *SegmentInfo) error {
-	if Params.DataCoordCfg.EnableStatsTask.GetAsBool() && !segment.GetIsSorted() && !segment.GetIsImporting() {
+	if Params.DataCoordCfg.EnableStatsTask.GetAsBool() && !segment.GetIsSorted() {
 		log.Ctx(ctx).Debug("segment is not sorted by pk, skip create indexes", zap.Int64("segmentID", segment.GetID()))
 		return nil
 	}
diff --git a/internal/datacoord/server.go b/internal/datacoord/server.go
index 9b4bc31a5a..e2a9712ee2 100644
--- a/internal/datacoord/server.go
+++ b/internal/datacoord/server.go
@@ -877,16 +877,26 @@ func (s *Server) postFlush(ctx context.Context, segmentID UniqueID) error {
 	}
 	// set segment to SegmentState_Flushed
 	var operators []UpdateOperator
-	operators = append(operators, SetSegmentIsInvisible(segmentID, true))
+	if Params.DataCoordCfg.EnableStatsTask.GetAsBool() {
+		operators = append(operators, SetSegmentIsInvisible(segmentID, true))
+	}
 	operators = append(operators, UpdateStatusOperator(segmentID, commonpb.SegmentState_Flushed))
 	err := s.meta.UpdateSegmentsInfo(ctx, operators...)
 	if err != nil {
 		log.Warn("flush segment complete failed", zap.Error(err))
 		return err
 	}
-	select {
-	case getStatsTaskChSingleton() <- segmentID:
-	default:
+
+	if Params.DataCoordCfg.EnableStatsTask.GetAsBool() {
+		select {
+		case getStatsTaskChSingleton() <- segmentID:
+		default:
+		}
+	} else {
+		select {
+		case getBuildIndexChSingleton() <- segmentID:
+		default:
+		}
 	}
 
 	insertFileNum := 0
diff --git a/pkg/util/paramtable/component_param.go b/pkg/util/paramtable/component_param.go
index 294396c343..b254880a90 100644
--- a/pkg/util/paramtable/component_param.go
+++ b/pkg/util/paramtable/component_param.go
@@ -4809,6 +4809,7 @@ if param targetVecIndexVersion is not set, the default value is -1, which means
 		DefaultValue: "true",
 		PanicIfEmpty: false,
 		Export:       false,
+		Forbidden:    true,
 	}
 	p.EnableStatsTask.Init(base.mgr)