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', 'm5g930v4dku9bcb2ibs923mec5', '18.215.161.19', '1560710412', '1560710412', '/shop/product_info.php?info=p341_1-3--SONY-Super-HAD-Kamera-520TVL--Fix-Objektiv.html')

[XT SQL Error]