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', '2rgakmcqlptf8skvgjta544ld0', '3.235.227.117', '1627788554', '1627788554', '/')

[XT SQL Error]