1366 - Incorrect integer value: '' for column `db162720`.`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', 'glm28th13c9u246o898qn9he45', '3.139.86.56', '1713504307', '1713504307', '/index.php/cat/c20_.html')

[XT SQL Error]