1366 - Incorrect integer value: '' for column `shop_db3`.`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', 'ca13d621be024fbac85cffc69ac9ecef', '3.139.72.78', '1713985139', '1713985139', '/advanced_search.php?XTCsid=9ed062a1d997e94e67f071e9bc3ac71b')

[XT SQL Error]