1366 - Incorrect integer value: '' for column `dbkh8z2q`.`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', '623aa259556d88914f02cb83908217c13c731a04', '34.238.190.122', '1591348751', '1591348751', '/eshop/product_info.php?info=p19_Tourposter-2011.html&XTCsid=59709a364b000bb8f57a27f6dd6a6b20')

[XT SQL Error]