1366 - Incorrect integer value: '' for column `dogsdream`.`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', 'c08896d266ac3a5113edc06d552215c0', '3.145.72.44', '1732271772', '1732271772', '/shop/index.php')

[XT SQL Error]