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', 'g1erdlc2soe1lfupo1irn8bfg1', '54.225.38.2', '1534809423', '1534809423', '/catalog/default.php?cPath=48&osCsid=70jec8114o1869v27j140u5rn1')

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