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', 'vmd7cp8qdb9p9dim1f59dlk9b0', '3.85.143.239', '1558356694', '1558356694', '/shop/advanced_search.php')

[XT SQL Error]