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', 'uu3nkkko52p6ub685dfphuj9p3', '216.73.216.135', '1769583254', '1769583254', '/shop_content.php/coID/100')

[XT SQL Error]