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', '8a554d92af055ef32df0e9700eea4ef4', '216.73.216.110', '1768332792', '1768332792', '/index.php/cat/c34_Kontinente.html')

[XT SQL Error]