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', '6c9e846aa913e357c1f044dd8762416e', '216.73.216.3', '1766646947', '1766646947', '/index.php/cat/c34_Continents.html')

[XT SQL Error]