1366 - Incorrect integer value: '' for column `usr_web74_1`.`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', 'd8l8al192rjr76jtn2r9ht66v5', '216.73.216.41', '1762446240', '1762446240', '/product_info.php?info=p1764_Einkaufskorb-L.html')

[XT SQL Error]