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', 'olc51ut0nc54680ojlr4fkb6l6', '54.225.26.44', '1539937960', '1539937960', '/catalog/default.php?cPath=46&osCsid=vbg52lp6mnuanqpfeqbse37uh1')

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