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', '6ci2cil63lcoecfq2cl1mj14s1', '34.229.113.106', '1563538353', '1563538353', '/shop/product_info.php?info=p14_1-3--SONY-Super-HAD-Kamera-520TVL--4-9mm-Vari-Focal.html')

[XT SQL Error]