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', 's10tdr4ueo8m5ulg7o0pf8skl7', '216.73.216.181', '1752109739', '1752109739', '/product_info.php/info/p7036_Wandhalter-f--r-Feuerl--scher.html')

[XT SQL Error]