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', '9bb8h73uopql2s6ladpsivtc81', '54.92.163.105', '1539649877', '1539649877', '/catalog/products_new.php?page=5&osCsid=7mu73nota6sk5v8739d4a0doc3')

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