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', 'i23fq8qrehlidt5r0nl5q5ihj0', '34.229.113.106', '1563542125', '1563542125', '/shop/shopping_cart.php')

[XT SQL Error]