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', '7431c41dcd3e66ae8d1f2f1afc6637be', '18.219.224.103', '1713523418', '1713523418', '/product_info.php?info=p321_Easy-Tunes--Rhythmus-Leadsheets-.html&XTCsid=887fff7384999e8c958f14224ebe6b7c')

[XT SQL Error]