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', '2ptibupvad2dehc9kbnejdhjk5', '54.80.219.236', '1537456109', '1537456109', '/catalog/products_new.php?page=2&osCsid=ri50g9t88rd2ot1n73eboc65j3')

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