diff --git a/core/modules/action/src/ActionFormBase.php b/core/modules/action/src/ActionFormBase.php
index 0b972d4..4593392 100644
--- a/core/modules/action/src/ActionFormBase.php
+++ b/core/modules/action/src/ActionFormBase.php
@@ -80,6 +80,7 @@ public function form(array $form, FormStateInterface $form_state) {
       '#machine_name' => array(
         'exists' => array($this, 'exists'),
       ),
+      '#element_validate' => !$this->entity->isNew() ? [] : '',
     );
     $form['plugin'] = array(
       '#type' => 'value',