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', '521193632623b7a41c4300ef0c25633e', '100.25.40.11', '1710835678', '1710835678', '/product_info.php/language/de/info/p4017_Reliefkarten-Poster.html')

[XT SQL Error]