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', '5c2492aa99ee86eaab312d796332f837', '216.73.216.20', '1771725448', '1771725448', '/product_info.php?info=p1835_Jungfrau-Ins--2-Satellitenbild.html')

[XT SQL Error]