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', '88f21ivilmgeko6vh96bgsrt30', '54.81.196.35', '1534736555', '1534736555', '/catalog/privacy.php?osCsid=3ijamr3n7he37mp6bmnr787v30')

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