1366 - Incorrect integer value: '' for column `hbl_shop`.`whos_online`.`customer_id` at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', '1i8tj3afj5a6eh7qbjf3u18eo4', '216.73.216.30', '1751741314', '1751741314', '/product_info.php?info=p54_800673-Bauschubkarre--HBL---75-Liter.html')

[XT SQL Error]