1366 - Incorrect integer value: '' for column `mapshopatlogis`.`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', 'e0a150a2ab085f8ab4d77a4f83e97f67', '44.200.169.3', '1670399790', '1670399790', '/index.php?refID=2')

[XT SQL Error]