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', '9uid2pfn4kp74l5qm5213pkv63', '54.167.243.214', '1534805688', '1534805688', '/catalog/product_info.php?products_id=374&osCsid=nfa2157thpsc5bi2muj2o87fd6')

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