1366 - Incorrect integer value: '' for column `hoc_db9`.`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', 'c400c39e326370c0076f95d1d48db5d7', '44.212.99.248', '1675242697', '1675242697', '/advanced_search_result.php?keywords=student&x=6&y=6')

[XT SQL Error]