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', 'aaa6ba537ea993fcf41ea6a90cc096b3', '18.188.218.134', '1734829249', '1734829249', '/index.php/cat/c19_Reliefkarten-Digital.html?refID=2')

[XT SQL Error]