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', '8geh2d77huv52dgppb9tcvnqc2', '54.80.188.87', '1539999660', '1539999660', '/catalog/default.php?cPath=54_148&osCsid=konekjck7lldmfuguhofe5f2m2')

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