1366 - Incorrect integer value: '' for column `argus_xtc`.`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', 'tpu7jkrmk2i7msmvb76s18p6k6', '18.206.241.26', '1563754570', '1563754570', '/shop/')

[XT SQL Error]