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', 'mp1ddpnfi11jl96kptojmc9qa5', '54.198.52.82', '1537749723', '1537749723', '/catalog/default.php?cPath=49_176&osCsid=ldmmitulveqlrrfac9gbbh8241')

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