1366 - Incorrect integer value: '' for column `dbbgz2tq`.`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', 'bf9d6a6b691460fba5541c21fcf4d9886824a820', '34.231.21.83', '1591431705', '1591431705', '/newsletter.php')

[XT SQL Error]