diff --git a/manifests/crd.yaml b/manifests/crd.yaml
index a1717e5497..cb174a7766 100644
--- a/manifests/crd.yaml
+++ b/manifests/crd.yaml
@@ -7060,10 +7060,6 @@ spec:
             tidb:
               description: TidbAutoScalerSpec describes the spec for tidb auto-scaling
               properties:
-                MetricsTimeDuration:
-                  description: MetricsTimeDuration describe the Time duration to be
-                    queried in the Prometheus
-                  type: string
                 maxReplicas:
                   description: maxReplicas is the upper limit for the number of replicas
                     to which the autoscaler can scale out. It cannot be less than
@@ -7082,6 +7078,10 @@ spec:
                     metric will be set to 80% average CPU utilization.
                   items: {}
                   type: array
+                metricsTimeDuration:
+                  description: MetricsTimeDuration describe the Time duration to be
+                    queried in the Prometheus
+                  type: string
                 minReplicas:
                   description: minReplicas is the lower limit for the number of replicas
                     to which the autoscaler can scale down.  It defaults to 1 pod.
@@ -7120,10 +7120,6 @@ spec:
             tikv:
               description: TikvAutoScalerSpec describes the spec for tikv auto-scaling
               properties:
-                MetricsTimeDuration:
-                  description: MetricsTimeDuration describe the Time duration to be
-                    queried in the Prometheus
-                  type: string
                 maxReplicas:
                   description: maxReplicas is the upper limit for the number of replicas
                     to which the autoscaler can scale out. It cannot be less than
@@ -7142,6 +7138,10 @@ spec:
                     metric will be set to 80% average CPU utilization.
                   items: {}
                   type: array
+                metricsTimeDuration:
+                  description: MetricsTimeDuration describe the Time duration to be
+                    queried in the Prometheus
+                  type: string
                 minReplicas:
                   description: minReplicas is the lower limit for the number of replicas
                     to which the autoscaler can scale down.  It defaults to 1 pod.
diff --git a/pkg/apis/pingcap/v1alpha1/openapi_generated.go b/pkg/apis/pingcap/v1alpha1/openapi_generated.go
index 42c2712634..dabd175b7b 100644
--- a/pkg/apis/pingcap/v1alpha1/openapi_generated.go
+++ b/pkg/apis/pingcap/v1alpha1/openapi_generated.go
@@ -808,7 +808,7 @@ func schema_pkg_apis_pingcap_v1alpha1_BasicAutoScalerSpec(ref common.ReferenceCa
 							},
 						},
 					},
-					"MetricsTimeDuration": {
+					"metricsTimeDuration": {
 						SchemaProps: spec.SchemaProps{
 							Description: "MetricsTimeDuration describe the Time duration to be queried in the Prometheus",
 							Type:        []string{"string"},
@@ -5705,7 +5705,7 @@ func schema_pkg_apis_pingcap_v1alpha1_TidbAutoScalerSpec(ref common.ReferenceCal
 							},
 						},
 					},
-					"MetricsTimeDuration": {
+					"metricsTimeDuration": {
 						SchemaProps: spec.SchemaProps{
 							Description: "MetricsTimeDuration describe the Time duration to be queried in the Prometheus",
 							Type:        []string{"string"},
@@ -6605,7 +6605,7 @@ func schema_pkg_apis_pingcap_v1alpha1_TikvAutoScalerSpec(ref common.ReferenceCal
 							},
 						},
 					},
-					"MetricsTimeDuration": {
+					"metricsTimeDuration": {
 						SchemaProps: spec.SchemaProps{
 							Description: "MetricsTimeDuration describe the Time duration to be queried in the Prometheus",
 							Type:        []string{"string"},
diff --git a/pkg/apis/pingcap/v1alpha1/tidbclusterautoscaler_types.go b/pkg/apis/pingcap/v1alpha1/tidbclusterautoscaler_types.go
index af8ae40128..139ee7c744 100644
--- a/pkg/apis/pingcap/v1alpha1/tidbclusterautoscaler_types.go
+++ b/pkg/apis/pingcap/v1alpha1/tidbclusterautoscaler_types.go
@@ -115,7 +115,7 @@ type BasicAutoScalerSpec struct {
 
 	// MetricsTimeDuration describe the Time duration to be queried in the Prometheus
 	// +optional
-	MetricsTimeDuration *string `json:"MetricsTimeDuration,omitempty"`
+	MetricsTimeDuration *string `json:"metricsTimeDuration,omitempty"`
 
 	// ScaleOutThreshold describe the consecutive threshold for the auto-scaling,
 	// if the consecutive counts of the scale-out result in auto-scaling reach this number,