1366 - Incorrect integer value: '' for column `hbl_shop`.`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', 'ahla4o5uc7andmt2m03c6k1681', '3.135.236.62', '1747156746', '1747156746', '/product_info.php?info=p60_800758-Ersatzachse-fuer-Bauschubkarrenrad.html')

[XT SQL Error]