Not a bug Users breaking when using facebook.

I noticed now when a user registered with facebook, that I could not delete them.

I get the following error:

Mysqli statement execute error : Cannot delete or update a parent row: a foreign key constraint fails (`xenforo_forum/lpsf_response`, CONSTRAINT `lpsf_response_ibfk_2` FOREIGN KEY (`user_id`) REFERENCES `xf_user` (`user_id`))
  1. Zend_Db_Statement_Mysqli->_execute() in Zend/Db/Statement.php at line 317
  2. Zend_Db_Statement->execute() in Zend/Db/Adapter/Abstract.php at line 479
  3. Zend_Db_Adapter_Abstract->query() in Zend/Db/Adapter/Abstract.php at line 661
  4. Zend_Db_Adapter_Abstract->delete() in XenForo/DataWriter.php at line 1784
  5. XenForo_DataWriter->_delete() in XenForo/DataWriter.php at line 1737
  6. XenForo_DataWriter->delete() in XenForo/Controller.php at line 916
  7. XenForo_Controller->_deleteData() in XenForo/ControllerAdmin/User.php at line 574
  8. XenForo_ControllerAdmin_User->actionDelete() in XenForo/FrontController.php at line 310
  9. XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 132
  10. XenForo_FrontController->run() in /home/adm33386/domains/ at line 13