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', 'abc14a64039f50009408777485ae3db6', '216.73.216.35', '1751515228', '1751515228', '/index.php/language/en/cat/c37_Welt.html')

[XT SQL Error]