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', '767d8a39fc184f7acd074588cc52398c', '216.73.216.20', '1771725552', '1771725552', '/product_info.php?info=p3282_Solomon-Ins--3-Reliefkarte.html')

[XT SQL Error]