diff --git a/cmd/kubebuilder_marker_generator/main.go b/cmd/kubebuilder_marker_generator/main.go
index 8fd91278..1326493f 100644
--- a/cmd/kubebuilder_marker_generator/main.go
+++ b/cmd/kubebuilder_marker_generator/main.go
@@ -80,6 +80,12 @@ func generate(fileName string) error { //nolint:gocognit,unparam
 								if strings.HasPrefix(comment, "// Format: ") {
 									addSimpleMarker(field, fileName, comment, "Format", "raw")
 								}
+								if strings.HasPrefix(comment, "// Required: true") {
+									if len(comments) == 2 && comments[0] == "// index" {
+										field.Decorations().Before = dst.NewLine
+										field.Decorations().Start.Append("// +kubebuilder:validation:Optional")
+									}
+								}
 
 							}
 							// if len(field.Names) > 0 {
diff --git a/models/acl.go b/models/acl.go
index 3a3d0953..f59cfbc2 100644
--- a/models/acl.go
+++ b/models/acl.go
@@ -51,6 +51,7 @@ type ACL struct {
 
 	// index
 	// Required: true
+	// +kubebuilder:validation:Optional
 	Index *int64 `json:"index"`
 
 	// value
diff --git a/models/backend_switching_rule.go b/models/backend_switching_rule.go
index 2169194f..e5f9e2f3 100644
--- a/models/backend_switching_rule.go
+++ b/models/backend_switching_rule.go
@@ -47,6 +47,7 @@ type BackendSwitchingRule struct {
 
 	// index
 	// Required: true
+	// +kubebuilder:validation:Optional
 	Index *int64 `json:"index"`
 
 	// name
diff --git a/models/capture.go b/models/capture.go
index 6fbfbb94..28e89050 100644
--- a/models/capture.go
+++ b/models/capture.go
@@ -34,9 +34,9 @@ import (
 //
 // swagger:model capture
 type Capture struct {
-
 	// index
 	// Required: true
+	// +kubebuilder:validation:Optional
 	Index *int64 `json:"index"`
 
 	// length
diff --git a/models/filter.go b/models/filter.go
index a6b2b4f8..8f54c752 100644
--- a/models/filter.go
+++ b/models/filter.go
@@ -64,6 +64,7 @@ type Filter struct {
 
 	// index
 	// Required: true
+	// +kubebuilder:validation:Optional
 	Index *int64 `json:"index"`
 
 	// A sample expression rule.
diff --git a/models/http_after_response_rule.go b/models/http_after_response_rule.go
index d447c918..db0763fd 100644
--- a/models/http_after_response_rule.go
+++ b/models/http_after_response_rule.go
@@ -69,6 +69,7 @@ type HTTPAfterResponseRule struct {
 
 	// index
 	// Required: true
+	// +kubebuilder:validation:Optional
 	Index *int64 `json:"index"`
 
 	// log level
diff --git a/models/http_check.go b/models/http_check.go
index 2d240f5d..e78849e9 100644
--- a/models/http_check.go
+++ b/models/http_check.go
@@ -71,6 +71,7 @@ type HTTPCheck struct {
 
 	// index
 	// Required: true
+	// +kubebuilder:validation:Optional
 	Index *int64 `json:"index"`
 
 	// linger
diff --git a/models/http_error_rule.go b/models/http_error_rule.go
index f12f12fb..fc44df44 100644
--- a/models/http_error_rule.go
+++ b/models/http_error_rule.go
@@ -44,6 +44,7 @@ type HTTPErrorRule struct {
 
 	// index
 	// Required: true
+	// +kubebuilder:validation:Optional
 	Index *int64 `json:"index"`
 
 	// return content
diff --git a/models/http_request_rule.go b/models/http_request_rule.go
index 17090456..bc9e9fa6 100644
--- a/models/http_request_rule.go
+++ b/models/http_request_rule.go
@@ -124,6 +124,7 @@ type HTTPRequestRule struct {
 
 	// index
 	// Required: true
+	// +kubebuilder:validation:Optional
 	Index *int64 `json:"index"`
 
 	// log level
diff --git a/models/http_response_rule.go b/models/http_response_rule.go
index e5d36bfa..8acbb10b 100644
--- a/models/http_response_rule.go
+++ b/models/http_response_rule.go
@@ -103,6 +103,7 @@ type HTTPResponseRule struct {
 
 	// index
 	// Required: true
+	// +kubebuilder:validation:Optional
 	Index *int64 `json:"index"`
 
 	// log level
diff --git a/models/log_target.go b/models/log_target.go
index 2b8ed1b6..5bbfd4b8 100644
--- a/models/log_target.go
+++ b/models/log_target.go
@@ -56,6 +56,7 @@ type LogTarget struct {
 
 	// index
 	// Required: true
+	// +kubebuilder:validation:Optional
 	Index *int64 `json:"index"`
 
 	// length
diff --git a/models/server_switching_rule.go b/models/server_switching_rule.go
index 5739c387..d18dc89a 100644
--- a/models/server_switching_rule.go
+++ b/models/server_switching_rule.go
@@ -47,6 +47,7 @@ type ServerSwitchingRule struct {
 
 	// index
 	// Required: true
+	// +kubebuilder:validation:Optional
 	Index *int64 `json:"index"`
 
 	// target server
diff --git a/models/stick_rule.go b/models/stick_rule.go
index acb212e6..48e42762 100644
--- a/models/stick_rule.go
+++ b/models/stick_rule.go
@@ -47,6 +47,7 @@ type StickRule struct {
 
 	// index
 	// Required: true
+	// +kubebuilder:validation:Optional
 	Index *int64 `json:"index"`
 
 	// pattern
diff --git a/models/tcp_check.go b/models/tcp_check.go
index e1555aee..081daf7a 100644
--- a/models/tcp_check.go
+++ b/models/tcp_check.go
@@ -78,6 +78,7 @@ type TCPCheck struct {
 
 	// index
 	// Required: true
+	// +kubebuilder:validation:Optional
 	Index *int64 `json:"index"`
 
 	// linger
diff --git a/models/tcp_request_rule.go b/models/tcp_request_rule.go
index 4d7662ac..81a3229b 100644
--- a/models/tcp_request_rule.go
+++ b/models/tcp_request_rule.go
@@ -75,6 +75,7 @@ type TCPRequestRule struct {
 
 	// index
 	// Required: true
+	// +kubebuilder:validation:Optional
 	Index *int64 `json:"index"`
 
 	// log level
diff --git a/models/tcp_response_rule.go b/models/tcp_response_rule.go
index 1e269b35..62e8b16e 100644
--- a/models/tcp_response_rule.go
+++ b/models/tcp_response_rule.go
@@ -64,6 +64,7 @@ type TCPResponseRule struct {
 
 	// index
 	// Required: true
+	// +kubebuilder:validation:Optional
 	Index *int64 `json:"index"`
 
 	// log level