1366 - Incorrect integer value: '' for column `mapshopatlogis`.`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', 'd043f00f2b825fd3177c6e5c22191ebb', '216.73.216.191', '1764401113', '1764401113', '/products_new.php/language/de')

[XT SQL Error]