1366 - Incorrect integer value: '' for column `argus_xtc`.`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', '2q56bc8ih4lf5itle434fsmur7', '3.85.143.239', '1558357560', '1558357560', '/shop/index.php?cat=c7_Komplettsysteme.html')

[XT SQL Error]