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', 'c19db5742974a67b15dbe7e4d3192783', '216.73.216.8', '1758031897', '1758031897', '/index.php/language/de/cat/c35_Laender.html')

[XT SQL Error]