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', 'kn7isd2ie7d16rk0lfprrtp0l3', '54.80.219.236', '1537452588', '1537452588', '/catalog/user_agreement.php?osCsid=fos6bk4ao12sbq3ahd6vj39hu7')

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