diff --git a/autogen/main/variables.tf.tmpl b/autogen/main/variables.tf.tmpl
index f711f9de2..80d24209c 100644
--- a/autogen/main/variables.tf.tmpl
+++ b/autogen/main/variables.tf.tmpl
@@ -611,7 +611,7 @@ variable "node_metadata" {
 
   validation {
     condition     = contains(["GKE_METADATA", "GCE_METADATA", "UNSPECIFIED", "GKE_METADATA_SERVER", "EXPOSE"], var.node_metadata)
-    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA or UNSPECIFIED."
+    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA, UNSPECIFIED, GKE_METADATA_SERVER or EXPOSE."
   }
 }
 {% endif %}
diff --git a/modules/beta-private-cluster-update-variant/variables.tf b/modules/beta-private-cluster-update-variant/variables.tf
index 163ca7529..9caf72d49 100644
--- a/modules/beta-private-cluster-update-variant/variables.tf
+++ b/modules/beta-private-cluster-update-variant/variables.tf
@@ -586,7 +586,7 @@ variable "node_metadata" {
 
   validation {
     condition     = contains(["GKE_METADATA", "GCE_METADATA", "UNSPECIFIED", "GKE_METADATA_SERVER", "EXPOSE"], var.node_metadata)
-    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA or UNSPECIFIED."
+    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA, UNSPECIFIED, GKE_METADATA_SERVER or EXPOSE."
   }
 }
 
diff --git a/modules/beta-private-cluster/variables.tf b/modules/beta-private-cluster/variables.tf
index 163ca7529..9caf72d49 100644
--- a/modules/beta-private-cluster/variables.tf
+++ b/modules/beta-private-cluster/variables.tf
@@ -586,7 +586,7 @@ variable "node_metadata" {
 
   validation {
     condition     = contains(["GKE_METADATA", "GCE_METADATA", "UNSPECIFIED", "GKE_METADATA_SERVER", "EXPOSE"], var.node_metadata)
-    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA or UNSPECIFIED."
+    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA, UNSPECIFIED, GKE_METADATA_SERVER or EXPOSE."
   }
 }
 
diff --git a/modules/beta-public-cluster-update-variant/variables.tf b/modules/beta-public-cluster-update-variant/variables.tf
index 9e8d5189b..cfb3a51c6 100644
--- a/modules/beta-public-cluster-update-variant/variables.tf
+++ b/modules/beta-public-cluster-update-variant/variables.tf
@@ -556,7 +556,7 @@ variable "node_metadata" {
 
   validation {
     condition     = contains(["GKE_METADATA", "GCE_METADATA", "UNSPECIFIED", "GKE_METADATA_SERVER", "EXPOSE"], var.node_metadata)
-    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA or UNSPECIFIED."
+    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA, UNSPECIFIED, GKE_METADATA_SERVER or EXPOSE."
   }
 }
 
diff --git a/modules/beta-public-cluster/variables.tf b/modules/beta-public-cluster/variables.tf
index 9e8d5189b..cfb3a51c6 100644
--- a/modules/beta-public-cluster/variables.tf
+++ b/modules/beta-public-cluster/variables.tf
@@ -556,7 +556,7 @@ variable "node_metadata" {
 
   validation {
     condition     = contains(["GKE_METADATA", "GCE_METADATA", "UNSPECIFIED", "GKE_METADATA_SERVER", "EXPOSE"], var.node_metadata)
-    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA or UNSPECIFIED."
+    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA, UNSPECIFIED, GKE_METADATA_SERVER or EXPOSE."
   }
 }
 
diff --git a/modules/private-cluster-update-variant/variables.tf b/modules/private-cluster-update-variant/variables.tf
index e5b2a618f..fc5bad76f 100644
--- a/modules/private-cluster-update-variant/variables.tf
+++ b/modules/private-cluster-update-variant/variables.tf
@@ -557,7 +557,7 @@ variable "node_metadata" {
 
   validation {
     condition     = contains(["GKE_METADATA", "GCE_METADATA", "UNSPECIFIED", "GKE_METADATA_SERVER", "EXPOSE"], var.node_metadata)
-    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA or UNSPECIFIED."
+    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA, UNSPECIFIED, GKE_METADATA_SERVER or EXPOSE."
   }
 }
 
diff --git a/modules/private-cluster/variables.tf b/modules/private-cluster/variables.tf
index e5b2a618f..fc5bad76f 100644
--- a/modules/private-cluster/variables.tf
+++ b/modules/private-cluster/variables.tf
@@ -557,7 +557,7 @@ variable "node_metadata" {
 
   validation {
     condition     = contains(["GKE_METADATA", "GCE_METADATA", "UNSPECIFIED", "GKE_METADATA_SERVER", "EXPOSE"], var.node_metadata)
-    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA or UNSPECIFIED."
+    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA, UNSPECIFIED, GKE_METADATA_SERVER or EXPOSE."
   }
 }
 
diff --git a/variables.tf b/variables.tf
index bd0b0d927..b11853ce4 100644
--- a/variables.tf
+++ b/variables.tf
@@ -527,7 +527,7 @@ variable "node_metadata" {
 
   validation {
     condition     = contains(["GKE_METADATA", "GCE_METADATA", "UNSPECIFIED", "GKE_METADATA_SERVER", "EXPOSE"], var.node_metadata)
-    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA or UNSPECIFIED."
+    error_message = "The node_metadata value must be one of GKE_METADATA, GCE_METADATA, UNSPECIFIED, GKE_METADATA_SERVER or EXPOSE."
   }
 }