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', 'dugtkt5ajojr36gmrvp05m2c96', '18.215.161.19', '1560713322', '1560713322', '/shop/product_info.php?info=p20_Netzteil-12V--stabilisiert---6A--fuer-bis-zu-4-Ueberwachungskamera.html')

[XT SQL Error]