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', 'a2c6cc02ef0eec9b1ffc66bc9c37e596', '216.73.216.3', '1763144261', '1763144261', '/index.php/cat/c40_Karten-Konfigurator.html')

[XT SQL Error]