I am getting this error.. System.data.sqlclient.sqlexception

System.Data.SqlClient.SqlException: 'The parameterized query '(@UserName nvarchar(4000),@Email nvarchar(4000))UPDATE AspNetUse' expects the parameter '@UserName', which was not supplied.'

public    ActionResult Edit(GetUserData getUserdata)
            {
                string query = "UPDATE AspNetUsers SET Email=@Email where UserName=@UserName";
                string DefaultConnection = ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString;
                using (SqlConnection con = new SqlConnection(connectionString))
                {
                    using (SqlCommand cmd = new SqlCommand(query))
                    {
                        cmd.Parameters.AddWithValue("@UserName", getUserdata.UserName);
                        cmd.Parameters.AddWithValue("@Email", getUserdata.Email);
                        cmd.Connection = con;
                        con.Open();
                        cmd.ExecuteNonQuery();
                        con.Close();
                    }
                }
                return Edit(getUserdata);
            }