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', 'u8g7v5fttsdvcffvu3ulb1ruj5', '54.161.100.24', '1539668171', '1539668171', '/catalog/account.php?osCsid=bkf99ptn7s2pd3ecq0tmuaevm7')

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