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', '2462c3cd8ff188dede61f668e0c3abed', '216.73.216.30', '1769515323', '1769515323', '/index.php/language/en/cat/c29_Continents.html')

[XT SQL Error]