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', 'd667da81357c193988ad2acd1a3b1d6b', '216.73.216.53', '1752099937', '1752099937', '/index.php/language/en/cat/c40_Karten-Konfigurator.html')

[XT SQL Error]