Erro de inserção de dados do desenvolvedor SQL

INSERT INTO Employee 
(Eno, Ename, Zip, Hdate, Creation_Date,Created_by, Last_Update_Date, Last_Update_By )
VALUES 
(111111, 'Man', '01234', 'Jan-10-1999','Jan-10-1999', 'Hank', 'Jan-10-1999', 'Hank');