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', 'mcntp4qm8ei3l0vuve051vcn46', '216.73.216.19', '1770840768', '1770840768', '/specials.php')

[XT SQL Error]