diff --git a/server/config/config.go b/server/config/config.go
index 86306de7cc9..3b5760b3b84 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
@@ -542,9 +541,6 @@ func (c *PDServerConfig) adjust(meta *configutil.ConfigMetaData) error {
 	if !meta.IsDefined("dashboard-address") {
 		c.DashboardAddress = defaultDashboardAddress
 	}
-	if !meta.IsDefined("trace-region-flow") {
-		c.TraceRegionFlow = defaultTraceRegionFlow
-	}
 	if !meta.IsDefined("flow-round-by-digit") {
 		configutil.AdjustInt(&c.FlowRoundByDigit, defaultFlowRoundByDigit)
 	}