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', 'd21d17a76b93157ac128d882c5638c94', '34.231.247.88', '1653607531', '1653607531', '/shop_content.php/coID/23')

[XT SQL Error]