diff --git a/mmv1/products/apigateway/api.yaml b/mmv1/products/apigateway/api.yaml
index 154dfae87c08..9af8cbb32183 100644
--- a/mmv1/products/apigateway/api.yaml
+++ b/mmv1/products/apigateway/api.yaml
@@ -152,7 +152,7 @@ objects:
             required: true
             description: |
               Google Cloud IAM service account used to sign OIDC tokens for backends that have authentication configured
-              (https://cloud.google.com/service-infrastructure/docs/service-management/reference/rest/v1/services.configs#backend). 
+              (https://cloud.google.com/service-infrastructure/docs/service-management/reference/rest/v1/services.configs#backend).
       - !ruby/object:Api::Type::Array
         name: 'openapiDocuments'
         description: |
@@ -219,9 +219,9 @@ objects:
       - !ruby/object:Api::Type::String
         name: 'apiConfig'
         required: true
-        input: true
         description: |
-          Resource name of the API Config for this Gateway. Format: projects/{project}/locations/global/apis/{api}/configs/{apiConfig}
+          Resource name of the API Config for this Gateway. Format: projects/{project}/locations/global/apis/{api}/configs/{apiConfig}.
+          When changing api configs please ensure the new config is a new resource and the lifecycle rule `create_before_destroy` is set.
       - !ruby/object:Api::Type::String
         name: 'defaultHostname'
         output: true
diff --git a/mmv1/third_party/terraform/tests/resource_api_gateway_gateway_test.go.erb b/mmv1/third_party/terraform/tests/resource_api_gateway_gateway_test.go.erb
index 7a2ebe6158b8..fe2db6a7b1f3 100644
--- a/mmv1/third_party/terraform/tests/resource_api_gateway_gateway_test.go.erb
+++ b/mmv1/third_party/terraform/tests/resource_api_gateway_gateway_test.go.erb
@@ -44,6 +44,9 @@ resource "google_api_gateway_api_config" "api_gw" {
   provider = google-beta
   api = google_api_gateway_api.api_gw.api_id
   api_config_id = "tf-test-api-gw%{random_suffix}"
+	lifecycle {
+    create_before_destroy = true
+  }
 
   openapi_documents {
     document {