1366 - Incorrect integer value: '' for column `sql12320`.`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', '311787aeb5c9d133ceeb0bc54c93d3a3', '3.83.188.254', '1585990431', '1585990431', '/shop/index.php/cat/c16_Edelbraende.html')

[XT SQL Error]