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', 'p64ic89gah9591v8n90089u6a4', '3.235.193.1', '1590365952', '1590365952', '/shop_content.php?coID=9')

[XT SQL Error]