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', 'dd4a81668fee230c06dfa07cc93ab5ed', '216.73.216.9', '1759436466', '1759436466', '/index.php/cat/c34_Continents.html')

[XT SQL Error]