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', '39p87vpdvfjas42s2emq7ggtv3', '54.224.220.72', '1534760938', '1534760938', '/catalog/login.php?osCsid=ssoa697mb3n0alhgir1glrtpp4')

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