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', 'tnnr5ba02r2rdic9dfthnp6ct6', '54.161.49.216', '1534462997', '1534462997', '/catalog/product_info.php?products_id=893&osCsid=82gbmmuj30sntm6ebdrfub29f5')

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