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', 'q82fua59f1acv68oi1u3k90bn7', '18.234.88.196', '1558465432', '1558465432', '/lkw_plane_tasche_lkw_plane/shop_content.php/coID/1')

[XT SQL Error]