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', '4a764662ca74cc4558fa5dfad668dac4', '3.83.188.254', '1585988557', '1585988557', '/shop/index.php')

[XT SQL Error]