1366 - Incorrect integer value: '' for column `drucktiv`.`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', '1l6fiertb7svn0njdujmmhgqb4', '216.73.216.177', '1752882271', '1752882271', '/')

[XT SQL Error]