Fix bad sql connexion

models/User.php

@@ -112,7 +112,7 @@ class User {
             $stmt2->bindParam(":partner_id", $partner_id);
             $stmt2->execute();
 
-            $stmt = $this->db->prepare("
+            $stmt = $this->conn->prepare("
                 UPDATE movies m1
                 JOIN movies m2 ON m1.tmdb_id = m2.tmdb_id
                 SET m1.is_common = 1, m2.is_common = 1