$result = CRM_Core_DAO::executeQuery($insertSql);
CRM_Core_DAO::executeQuery(
"INSERT IGNORE INTO civicrm_group_contact_cache (contact_id, group_id)
- SELECT DISTINCT id, group_id FROM $tempTable
+ SELECT DISTINCT $idName, group_id FROM $tempTable
");
CRM_Core_DAO::executeQuery(" DROP TABLE $tempTable");
}