1366 - Incorrect integer value: '' for column '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', 'beef7a99408f846f07ef28192fc20a53', '34.229.24.100', '1563486279', '1563486279', '/product_info.php/info/p765_Thong-Nature-Fredy.html')

[XT SQL Error]