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', '75b922c10e73f7e86529aa6821bb044a', '3.87.133.69', '1711629435', '1711629435', '/product_info.php?info=p321_Easy-Tunes--Rhythmus-Leadsheets-.html&XTCsid=ae958f15bfdd7f280c3365e7be4f705d')

[XT SQL Error]