1366 - Incorrect integer value: '' for column `magickland`.`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', 'f4v8dpmr8jqo4nt5ou5ubhasp2', '18.189.178.189', '1718728801', '1718728801', '/index.php/cat/admin/images/icons/templates/xtc5/img/telephone2.png')

[XT SQL Error]