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', '4cl7fqlrlincv5i834h91be973', '54.162.15.31', '1537585571', '1537585571', '/catalog/contact_us.php?osCsid=rgco69d72v37m43anv5mvpmqn5')

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