PostgreSQL issue : Update #7007 fails

When i launch the update, i got this message :

Failed: PDOException : SQLSTATE[42601]: Syntax error: 7 ERROR: syntax error at or near "m" LINE 1: DELETE m ^: DELETE m FROM {metatag} m LEFT OUTER JOIN {node} n ON m.entity_id=n.nid WHERE m.entity_type='node' AND n.nid IS NULL; Array ( ) dans metatag_update_7007() (ligne 325 dans /usr/local/www/sites/all/modules/metatag/metatag.install).

I use postgresql