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', 'a7ec435ab8d00c36f7d50ea1a54d96e9', '216.73.216.8', '1757987233', '1757987233', '/index.php/language/de/cat/c37_World.html')

[XT SQL Error]