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', '885e99f6735c3e0bb185436736e91cb8', '216.73.216.108', '1763378680', '1763378680', '/index.php/cat/c19_Reliefkarten-Digital.html')

[XT SQL Error]