Solo crear el DeployLocal una vez

app/views/deploys/_deploy_local.haml

@@ -9,4 +9,6 @@
     = sanitize_markdown t('.help', url: deploy.object.url),
       tags: %w[p strong em a]
 
-    = deploy.hidden_field :type
+    -# No duplicarlos una vez que existen.
+    - unless deploy.object.persisted?
+      = deploy.hidden_field :type

test/controllers/sites_controller_test.rb

@@ -119,12 +119,7 @@ class SitesControllerTest < ActionDispatch::IntegrationTest
         title: name,
         description: name * 2,
         design_id: design.id,
-        licencia_id: Licencia.all.second.id,
-        deploys_attributes: {
-          '0' => {
-            type: 'DeployLocal'
-          }
-        }
+        licencia_id: Licencia.all.second.id
       }
     }