1366 - Incorrect integer value: '' for column `meersalz_2017`.`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', 'u0nkh8jlck1h7ugc9p8t8ulpq5', '184.72.102.217', '1610965479', '1610965479', '/shop_content.php?coID=11')

[XT SQL Error]