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', '91203c32fb3a560b2d7dd852fc65c5d7', '3.135.217.212', '1722066147', '1722066147', '/shop/index.php')

[XT SQL Error]