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', 'ac48bb34cf6aefbb1a5700690d47f8a9', '216.73.216.83', '1764008753', '1764008753', '/index.php/cat/c37_World.html')

[XT SQL Error]