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', '50bc3c703007692fdc874348ff214faa', '216.73.216.8', '1758105151', '1758105151', '/index.php/cat/c42_Vector-Maps.html')

[XT SQL Error]