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', 'ba4fa1356499bb146334f8f6694b3006', '216.73.216.198', '1752881765', '1752881765', '/index.php/language/de/cat/c30_Laender.html')

[XT SQL Error]