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', '409e33df08ff76b588d01b11f324cd3d', '3.15.6.77', '1713578772', '1713578772', '/index.php/language/en/cat/c8_Relief-Map-Poster.html')

[XT SQL Error]