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', 'd1e737dfb01fc2a608d6cdd47614c12e', '216.73.216.58', '1759688664', '1759688664', '/product_info.php?info=p1819_Solomon-Ins--22-Satellitenbild.html')

[XT SQL Error]