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', '0b0f35309e0db4774a0af7298377dbd0', '216.73.216.110', '1768436301', '1768436301', '/index.php/language/en/cat/c40_Karten-Konfigurator.html')

[XT SQL Error]