FIX Sql error in widget of product for stock alerts

htdocs/core/boxes/box_produits_alerte_stock.php

@@ -74,7 +74,7 @@ class box_produits_alerte_stock extends ModeleBoxes
 			$sql.= " AND p.tosell = 1 AND p.seuil_stock_alerte > 0";
 			if (empty($user->rights->produit->lire)) $sql.=' AND p.fk_product_type != 0';
 			if (empty($user->rights->service->lire)) $sql.=' AND p.fk_product_type != 1';
-			$sql.= " GROUP BY p.rowid, p.ref, p.label, p.price, p.price_base_type, p.price_ttc, p.fk_product_type, p.tms, p.tosell, p.tobuy, p.seuil_stock_alerte";
+			$sql.= " GROUP BY p.rowid, p.ref, p.label, p.price, p.price_base_type, p.price_ttc, p.fk_product_type, p.tms, p.tosell, p.tobuy, p.seuil_stock_alerte, p.entity";
 			$sql.= " HAVING SUM(".$db->ifsql("s.reel IS NULL","0","s.reel").") < p.seuil_stock_alerte";
 			$sql.= $db->order('p.seuil_stock_alerte', 'DESC');
 			$sql.= $db->plimit($max, 0);