Notice : Undefined index: entity type dans views_handler_field_entity->init() (

Just a notice I add this in views data iintegrations :
Line 221 :

  $data['simplenews_newsletter']['table'] = array(
    // Define the base group of this table. Fields that don't
    // have a group defined will go into this field by default.
    'group' => t('Simplenews issue'),
+   'entity type' =>'simplenews',
  );