Fatal error: Uncaught Error:

De volgende query heeft gefaald: 'INSERT INTO `webshop_product_views` ( `product_id`,`visitor_id` ) VALUES ( '2729','' )'
. En gaf de volgende MySQL fout: Incorrect integer value: '' for column `telefoonstar_nl`.`webshop_product_views`.`visitor_id` at row 1

in /customers/4/1/2/telefoonstar.nl/httpd.www/includes/classes/class.database.php:284 Stack trace: #0 /customers/4/1/2/telefoonstar.nl/httpd.www/includes/classes/class.database.php(415): db->query('INSERT INTO `we...') #1 /customers/4/1/2/telefoonstar.nl/httpd.www/modules/webshop/classes/ProductViews.php(16): db->insert('INSERT INTO `we...') #2 /customers/4/1/2/telefoonstar.nl/httpd.www/modules/webshop/webshop.functions.php(89): Webshop\ProductViews::add(Array) #3 /customers/4/1/2/telefoonstar.nl/httpd.www/includes/filter.php(167): webshopTemplateHandler(NULL) #4 /customers/4/1/2/telefoonstar.nl/httpd.www/includes/functions.php(2841): apply_filters('modules_loaded', NULL) #5 /customers/4/1/2/telefoonstar.nl/httpd.www/inclu in /customers/4/1/2/telefoonstar.nl/httpd.www/includes/classes/class.database.php on line 284