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', 'qbo1bg7dtvcalquhmqq7fjjsb0', '54.166.203.17', '1537346070', '1537346070', '/catalog/product_info.php?products_id=976&osCsid=u5v9cmoe2br2a0f1958odshv22')

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