Erreur: Impossible de récupérer les valeurs left & right du noeud id_cat=.

Fichier: /home/stillbe/domains/stillbe.com/public_html/includes/class/mesPDO.php
Ligne: 48
Rapport Base de données: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'LIMIT 1' at line 1
Requête invalide: SELECT lft, rgt FROM shop_sections WHERE id_cat= LIMIT 1