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', 'j3h9nip2eof786hdniqkrglrj1', '54.80.188.87', '1539849237', '1539849237', '/catalog/default.php?cPath=53&osCsid=mgtbnmhklabenbfik9u1i8hg90')

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