1366 - Incorrect integer value: '' for column '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', '16b43c4190e4a7ac703fc560e80885fd', '3.229.142.91', '1635007539', '1635007539', '/')

[XT SQL Error]