diff --git a/charts/karmada/_crds/bases/policy/policy.karmada.io_clusterpropagationpolicies.yaml b/charts/karmada/_crds/bases/policy/policy.karmada.io_clusterpropagationpolicies.yaml
index 250a56b35776..c1ac7c57262e 100644
--- a/charts/karmada/_crds/bases/policy/policy.karmada.io_clusterpropagationpolicies.yaml
+++ b/charts/karmada/_crds/bases/policy/policy.karmada.io_clusterpropagationpolicies.yaml
@@ -164,6 +164,10 @@ spec:
                           cluster from which the application is migrated.
                           Valid options are "Immediately", "Graciously" and "Never".
                           Defaults to "Graciously".
+                        enum:
+                        - Immediately
+                        - Graciously
+                        - Never
                         type: string
                     required:
                     - decisionConditions
diff --git a/charts/karmada/_crds/bases/policy/policy.karmada.io_propagationpolicies.yaml b/charts/karmada/_crds/bases/policy/policy.karmada.io_propagationpolicies.yaml
index 7e69586fcd28..1415e24325dd 100644
--- a/charts/karmada/_crds/bases/policy/policy.karmada.io_propagationpolicies.yaml
+++ b/charts/karmada/_crds/bases/policy/policy.karmada.io_propagationpolicies.yaml
@@ -161,6 +161,10 @@ spec:
                           cluster from which the application is migrated.
                           Valid options are "Immediately", "Graciously" and "Never".
                           Defaults to "Graciously".
+                        enum:
+                        - Immediately
+                        - Graciously
+                        - Never
                         type: string
                     required:
                     - decisionConditions
diff --git a/charts/karmada/_crds/bases/work/work.karmada.io_clusterresourcebindings.yaml b/charts/karmada/_crds/bases/work/work.karmada.io_clusterresourcebindings.yaml
index 8263b2e225f1..7895411a95a2 100644
--- a/charts/karmada/_crds/bases/work/work.karmada.io_clusterresourcebindings.yaml
+++ b/charts/karmada/_crds/bases/work/work.karmada.io_clusterresourcebindings.yaml
@@ -335,6 +335,10 @@ spec:
                           cluster from which the application is migrated.
                           Valid options are "Immediately", "Graciously" and "Never".
                           Defaults to "Graciously".
+                        enum:
+                        - Immediately
+                        - Graciously
+                        - Never
                         type: string
                     required:
                     - decisionConditions
diff --git a/charts/karmada/_crds/bases/work/work.karmada.io_resourcebindings.yaml b/charts/karmada/_crds/bases/work/work.karmada.io_resourcebindings.yaml
index 7e2dd2eeade4..f69531f230bd 100644
--- a/charts/karmada/_crds/bases/work/work.karmada.io_resourcebindings.yaml
+++ b/charts/karmada/_crds/bases/work/work.karmada.io_resourcebindings.yaml
@@ -335,6 +335,10 @@ spec:
                           cluster from which the application is migrated.
                           Valid options are "Immediately", "Graciously" and "Never".
                           Defaults to "Graciously".
+                        enum:
+                        - Immediately
+                        - Graciously
+                        - Never
                         type: string
                     required:
                     - decisionConditions
diff --git a/pkg/apis/policy/v1alpha1/propagation_types.go b/pkg/apis/policy/v1alpha1/propagation_types.go
index 89c22b65e6e6..ee6a38a85867 100644
--- a/pkg/apis/policy/v1alpha1/propagation_types.go
+++ b/pkg/apis/policy/v1alpha1/propagation_types.go
@@ -286,6 +286,7 @@ type ApplicationFailoverBehavior struct {
 	// cluster from which the application is migrated.
 	// Valid options are "Immediately", "Graciously" and "Never".
 	// Defaults to "Graciously".
+	// +kubebuilder:validation:Enum=Immediately;Graciously;Never
 	// +kubebuilder:default=Graciously
 	// +optional
 	PurgeMode PurgeMode `json:"purgeMode,omitempty"`