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', 'b9ct428v1621i3j4r6t0up6j50', '54.80.219.236', '1537454187', '1537454187', '/catalog/user_agreement.php?osCsid=rj97frenr7vr9pg12john2iat1')

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