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', 'ebbc75dcf608486942801e64476601cd', '3.139.240.142', '1714182343', '1714182343', '/index.php/language/de/cat/c34_Continents.html')

[XT SQL Error]