1366 - Incorrect integer value: '' for column `schablone_1`.`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', '4e789e69e938da8d7ffd8c1fd6f0ff74', '13.59.82.167', '1715137355', '1715137355', '/shop/index.php')

[XT SQL Error]