1366 - Incorrect integer value: '' for column `dbkh8z2q`.`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', 'd038d23ac6a154f14d225c466cc75b4a33d1eaf4', '3.231.226.13', '1591473532', '1591473532', '/eshop/create_account.php?XTCsid=4ac38b9e9e64c1af6173e1cd3ca923d9')

[XT SQL Error]