diff --git a/alloydb/v1/alloydb-api.json b/alloydb/v1/alloydb-api.json
index 21c3a82e13f..471f78c3c7b 100644
--- a/alloydb/v1/alloydb-api.json
+++ b/alloydb/v1/alloydb-api.json
@@ -1489,7 +1489,7 @@
       }
     }
   },
-  "revision": "20231031",
+  "revision": "20231109",
   "rootUrl": "https://alloydb.googleapis.com/",
   "schemas": {
     "AutomatedBackupPolicy": {
@@ -2636,7 +2636,7 @@
           "type": "string"
         },
         "network": {
-          "description": "Required. The resource link for the VPC network in which cluster resources are created and from which they are accessible via Private IP. The network must belong to the same project as the cluster. It is specified in the form: \"projects/{project_number}/global/networks/{network_id}\". This is required to create a cluster.",
+          "description": "Optional. The resource link for the VPC network in which cluster resources are created and from which they are accessible via Private IP. The network must belong to the same project as the cluster. It is specified in the form: \"projects/{project_number}/global/networks/{network_id}\". This is required to create a cluster.",
           "type": "string"
         }
       },
diff --git a/alloydb/v1/alloydb-gen.go b/alloydb/v1/alloydb-gen.go
index 571c4e487bf..cf6186c4098 100644
--- a/alloydb/v1/alloydb-gen.go
+++ b/alloydb/v1/alloydb-gen.go
@@ -1853,7 +1853,7 @@ type NetworkConfig struct {
 	// Field name is intended to be consistent with Cloud SQL.
 	AllocatedIpRange string `json:"allocatedIpRange,omitempty"`
 
-	// Network: Required. The resource link for the VPC network in which
+	// Network: Optional. The resource link for the VPC network in which
 	// cluster resources are created and from which they are accessible via
 	// Private IP. The network must belong to the same project as the
 	// cluster. It is specified in the form: