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', '4a96bd90030263e42e542e71444db40f', '3.236.112.70', '1721654946', '1721654946', '/index.php?refID=1')

[XT SQL Error]