1366 - Incorrect integer value: '' for column `dogsdream`.`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', '7aba921180a105fb7028a14e42ccfb64', '13.59.225.66', '1747126653', '1747126653', '/shop/index.php/cat/c3_Vegetarisch.html')

[XT SQL Error]