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', 'eb13843e073b166cae1dcb1031f32726', '44.205.2.188', '1711715164', '1711715164', '/shop/index.php/cat/c4_Tierisch-gut.html')

[XT SQL Error]