db.Database.SaveChest C# (CSharp) Method

        public void SaveChest(Account acc, VaultChest chest)
        {
            MySqlCommand cmd = CreateQuery();
            cmd.CommandText = "UPDATE vaults SET items=@items WHERE accId=@accId AND chestId=@chestId;";
            cmd.Parameters.AddWithValue("@accId", acc.AccountId);
            cmd.Parameters.AddWithValue("@chestId", chest.ChestId);
            cmd.Parameters.AddWithValue("@items", chest._Items);
            cmd.ExecuteNonQuery();
        }