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', 'n8gf9t5iemah99pr8rh9l9eav3', '216.73.216.30', '1751758970', '1751758970', '/product_info.php?info=p46_802240-Gefluegel---Stuelptraenke--1-5-Liter.html')

[XT SQL Error]