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', 'hbkqg1do1kges1v3rubmve7nd5', '34.229.113.106', '1563538343', '1563538343', '/shop/shop_content.php?coID=2')

[XT SQL Error]