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', '8j5k935u1m6ckaq0n3e9i33rq0', '18.234.88.196', '1558465153', '1558465153', '/messenger_bag_tote_bag_canvas_cover/product_info.php/info/p31_change_purse_wallet_canvas_cover.html')

[XT SQL Error]