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', '18b2e97ee45a77fc49a5c34ca3c33d22', '216.73.216.53', '1752093453', '1752093453', '/index.php/cat/c30_Laender.html/page/2')

[XT SQL Error]