1366 - Incorrect integer value: '' for column `abtecsho_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', 'fb3l8u3brvqub3ggu6rp6hq3s0', '216.73.216.3', '1762360563', '1762360563', '/product_info.php/info/p6431_BGV-A8-F-03-Typ-S-Loeschschlauch---Zusatztext.html')

[XT SQL Error]