'.$link_content.''; return $out; } ?>1366 - Incorrect integer value: '' for column `rubikmazeshop`.`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', '6947f5fe2c87ea48a1c6bb5db4f97bd7', '3.215.16.238', '1716444453', '1716444453', '/rubikmazeshop/')

[XT SQL Error]