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', 'm1ravdvrj9k9bsfcere0v3g4j5', '54.225.26.44', '1539642731', '1539642731', '/catalog/default.php?cPath=53_219&osCsid=neqtv5akom3c5usri8emvitf01')

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