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', 'e4a45a17dcf2bd2d5d08fd090889dc0d', '216.73.216.8', '1758112187', '1758112187', '/index.php/cat/c34_Continents.html')

[XT SQL Error]