diff --git a/server/config/config.go b/server/config/config.go
index 86306de7cc9..16f67bc5787 100644
--- a/server/config/config.go
+++ b/server/config/config.go
@@ -205,7 +205,6 @@ const (
 	defaultLeaderPriorityCheckInterval = time.Minute
 
 	defaultUseRegionStorage  = true
-	defaultTraceRegionFlow   = true
 	defaultFlowRoundByDigit  = 3 // KB
 	maxTraceFlowRoundByDigit = 5 // 0.1 MB
 	defaultMaxResetTSGap     = 24 * time.Hour