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', 'm28kcmd9sd3t3i5ocar0p5mo42', '216.73.216.10', '1761780776', '1761780776', '/popup_content.php/coID/1')

[XT SQL Error]