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', 'de69a81a1890ecb3776c45f5f2a9f17f', '44.201.97.26', '1664426656', '1664426656', '/advanced_search_result.php?keywords=student&x=6&y=6')

[XT SQL Error]