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', 'hr3vbd77bchm6eo9h6ophslot1', '18.215.161.19', '1560711855', '1560711855', '/shop/product_info.php?info=p2_4-Kanal-JPEG2000-H-264-TRIPLEX-DVR-Rekorder-m--LAN-DVD.html')

[XT SQL Error]