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', 'c69b0d2e794df5c0a2a1c52c2332021a', '216.73.216.65', '1752608662', '1752608662', '/index.php/language/en/cat/c33_Satellite-Images-digital.html')

[XT SQL Error]