Creating default object from empty value in _entity_defaults_rebuild line 876 of entity.module).

on cmd i get this warning:
Creating default object from empty value entity.module:876
In browser i always get this warning:
Warning: Creating default object from empty value in _entity_defaults_rebuild() (line 876 of /mysite/profiles/openoutreach/modules/contrib/entity/entity.module) using the latest OO version.

 872     // Invoke the hook and collect default entities.
 873     $entities = array();
 874     foreach (module_implements($hook) as $module) {
 875       foreach ((array) module_invoke($module, $hook) as $name => $entity) {
 876         $entity->{$keys['name']} = $name;
 877         $entity->{$keys['module']} = $module;
 878         $entities[$name] = $entity;
 879       }
 880     }
 881     drupal_alter($hook, $entities);

Are there any ideas how i can fix this?