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', '0b97752a2c66fea5999b1fcd2a34ab3a', '18.191.234.62', '1714120093', '1714120093', '/index.php')

[XT SQL Error]