How to avoid overlapping rows in recyclerview

My recyclerview is repeating and overlapping the results.

cursor=Os.getCursorPecas();intiRow=cursor.getColumnIndex(DataBaseHandler.KEY_PECAS_OS_ID);intiId=cursor.getColumnIndex(DataBaseHandler.KEY_PECAS_OS_ID_PECA);intiName=cursor.getColumnIndex(DataBaseHandler.KEY_PECAS_OS_NAME);intiValor=cursor.getColumnIndex(DataBaseHandler.KEY_PECAS_OS_VALOR);intiRef=cursor.getColumnIndex(DataBaseHandler.KEY_PECAS_OS_REF);intiQtde=cursor.getColumnIndex(DataBaseHandler.KEY_PECAS_OS_QTDE);intiUnidade=cursor.getColumnIndex(DataBaseHandler.KEY_PECAS_OS_UNIDADE);intiIdCat=cursor.getColumnIndex(DataBaseHandler.KEY_PECAS_OS_CATEGORIA);intiCat=cursor.getColumnIndex(DataBaseHandler.KEY_PRODUTOS_CATEGORIA_NAME);if(cursor.moveToFirst()){do{//Log.v(LOG,"id carregado "+cursor.getInt(iRow));
                        PecasList lista = new PecasList(
                                cursor.getInt(iRow),
                                cursor.getInt(iId),
                                cursor.getString(iName),
                                null,
                                cursor.getString(iRef),
                                cursor.getDouble(iValor),
                                0.0,
                                null,
                                cursor.getInt(iQtde),
                                cursor.getString(iCat),
                                cursor.getInt(iIdCat),
                                cursor.getString(iUnidade));
                        pecasLists.add(lista);
                    }
                    while (cursor.moveToNext());
                }

                recyclerView.setAdapter(new ProdutosOsListAdapter(getContext(), pecasLists, ProdutosFragment.this));

My Adapter:

public class ProdutosOsListAdapter extends RecyclerView.Adapter<ProdutosOsListAdapter.PecasViewHolder> {

    private List<PecasList> lista;
    Context context;
    ProdutosFragment fragment;
    static int[] color;

    public ProdutosOsListAdapter(Context context, List<PecasList> lista, ProdutosFragment fragment) {
        this.context = context;
        this.lista = lista;
        this.fragment = fragment;
        color = AppContext.getContext().getResources().getIntArray(R.array.rainbow);
    }

    @Override
    public PecasViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_pecas_os, parent, false);
        return new PecasViewHolder(v);
    }

    @Override
    public void onBindViewHolder(final PecasViewHolder holder, int position) {
        final PecasList itens = lista.get(position);
        holder.nome.setText(itens.getName());

        int qtde = itens.getQtde();

        holder.valor.setText(qtde + " x " + Funcoes.moeda(itens.getValor()) + " = " + Funcoes.moeda(qtde * itens.getValor()));

        try {
            Drawable drawable = holder.shape.getBackground();
            holder.shape.setText(itens.getName().substring(0, 1).trim());
            int posit = AlfabetoEnum.valueOf(itens.getName().trim().substring(0, 1)).getValorLetra();
            drawable.setColorFilter(color[posit], PorterDuff.Mode.SRC_IN);
        } catch (Exception ignored) {

        }
        holder.btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                fragment.novoProduto(true, itens.getId() + "", (itens.getIdPec() == 0) ? null : itens.getIdPec() + "", null);

            }
        });


    }

    @Override
    public int getItemCount() {
        return lista.size();
    }

    class PecasViewHolder extends RecyclerView.ViewHolder {
        public TextView nome, valor, shape;
        public ImageButton btn;
        RelativeLayout row;

        PecasViewHolder(View view) {
            super(view);
            row = (RelativeLayout) view.findViewById(R.id.rowPeca);
            nome = (TextView) view.findViewById(R.id.nomePeca);
            valor = (TextView) view.findViewById(R.id.valorPeca);
            nome.setEllipsize(TextUtils.TruncateAt.END);
            nome.setSingleLine(true);
            shape = (TextView) view.findViewById(R.id.shapeLetra);
            btn = (ImageButton) view.findViewById(R.id.btn);
        }
    }

}