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', 'c328ecnbn3ii3mn079spm69684', '54.80.140.29', '1534484318', '1534484318', '/catalog/product_info.php?products_id=781&osCsid=mfptrolnqcjru8vljjgdfucg73')

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