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', 'htjuo6veu2olof6jmjig4v9tk0', '54.224.118.247', '1540076574', '1540076574', '/catalog/product_info.php?products_id=975&osCsid=f9lrctcqi8ucu09vbfdvpllsq0')

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