ListView with ListVIew with RadioListTile ListView

I have a list with firestore data, that data is ready for one or more ListView with RadioListTile, when I select a data after having selected one previously, it does not remove the previous data.

ListView.Builder(
physics: NeverScrollableScrollPhysics(),
shrinkWrap: true,
scrollDirection: Axis.vertical,
itemCount: _elements.length != 0 ? _elements.length : 0,
itemBuilder: (BuildContext context, int index) {

return RadioListTile(
  selected: selecoblig == _elements,
  groupValue: selecoblig,
  controlAffinity: ListTileControlAffinity.leading,
  title: Text(_elements[index].name),
  value: _elements[index].name,
  onChanged: (val) {
  setState(() {
  selecoblig = val;
  _ingredientes2.add(val);
  });
  print(_ingredientes2);
  },
 );
)}