1366 - Incorrect integer value: '' for column `abtecsho_shop`.`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', 's2pn8mgi9236643mep334n7h80', '18.97.9.170', '1739815213', '1739815213', '/index.php/manufacturers_id/13')

[XT SQL Error]