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', '91hoag7811lag2c5g5bkaju1u4', '54.161.71.87', '1537335692', '1537335692', '/catalog/product_info.php?products_id=976&osCsid=7td8vi8b1amijreodo2idpvb03')

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