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', 'e4fd3cbbb65a3ee1e36fd3f2f44171c6', '3.14.15.94', '1714138001', '1714138001', '/product_info.php/language/en/info/p2823_Heard-I--Reliefkarte.html')

[XT SQL Error]