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', 'gp7tv1mci7jtd6krhmj4gekbe2', '54.80.93.19', '1534311637', '1534311637', '/catalog/login.php?osCsid=b3j8e70tmrq4dv1e3fod044nt4')

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