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', 'mv7654bs9b1l64otnlu6mbv361', '18.215.161.19', '1560711247', '1560711247', '/shop/product_info.php?info=p1_Dome-Kamera-mit-1-3--SONY-CCD-540TVL.html')

[XT SQL Error]