1366 - Incorrect integer value: '' for column `pella-ware`.`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', 'doc5po8aboki9ustncuda47453', '34.201.16.34', '1711654818', '1711654818', '/login.php?XTCsid=doc5po8aboki9ustncuda47453')

[XT SQL Error]