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', 'c2778af5b24e4f418f2e69b9ea662f0a', '3.15.5.183', '1713533024', '1713533024', '/product_info.php?language=en&info=p247_Nessun-Dorma.html&XTCsid=244b07160d2ebeb432977424993b1b59')

[XT SQL Error]