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', 'lofe4g6f2mm40eepeuhcn3tlk0', '3.16.48.163', '1746970588', '1746970588', '/product_info.php?info=p547_805173-Oberofen-Edelstahl--druckfest--ohne-Mischbatterie.html')

[XT SQL Error]