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', '86519b494c38f11d44809489e75784de', '3.145.33.244', '1732270919', '1732270919', '/shop/index.php/cat/c4_Tierisch-gut.html')

[XT SQL Error]