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', 'm6ofl69pimqoa2cgk6fef1q4d1', '34.229.113.106', '1563538346', '1563538346', '/shop/index.php')

[XT SQL Error]