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', '984bacbe6310d64721f1fb889d104e58a7043718', '34.231.21.83', '1591428406', '1591428406', '/shop_content.php?coID=1')

[XT SQL Error]