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', 'opi7dia5uv7674ejbkcumdssd2', '54.92.190.11', '1537328903', '1537328903', '/catalog/product_info.php?products_id=152&osCsid=v4j2hdtvgmhe6hg2urhnpcrre7')

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