Error: Cannot invoke a non-'const' constructor where a const expression is expected

Pessoal, estou com problemas no meu código ao tentar executa-lo:

o código está desta forma:

import 'package:flutter/material.dart';

void main() => runApp(BytebankApp());

class BytebankApp extends StatelessWidget {
  const BytebankApp({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: Scaffold(
        body: FormularioTransferencia(),
      ),
    );
  }
}

class FormularioTransferencia extends StatelessWidget {
  final TextEditingController _controladorCampoNumeroConta =
      TextEditingController();
  final TextEditingController _controladorCampoValor = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text('Criando Transferência'),
        ),
        body: Column(
          children: <Widget>[
            Padding(
              padding: EdgeInsets.all(16.0),
              child: TextField(
                controller: _controladorCampoNumeroConta,
                style: TextStyle(fontSize: 24.0),
                decoration: const InputDecoration(
                    labelText: 'Número da conta', hintText: '0000'),
                keyboardType: TextInputType.number,
              ),
            ),
            Padding(
              padding: EdgeInsets.all(16.0),
              child: TextField(
                controller: _controladorCampoValor,
                style: TextStyle(fontSize: 24.0),
                decoration: const InputDecoration(
                    icon: Icon(Icons.monetization_on),
                    labelText: 'Valor',
                    hintText: '0.00'),
                keyboardType: TextInputType.number,
              ),
            ),
            ElevatedButton(
              child: Text('Confirmar'),
              onPressed: () {
                debugPrint('clicou no confirmar');
                final int? numeroConta =
                    int.tryParse(_controladorCampoNumeroConta.text);
                final double? valor =
                    double.tryParse(_controladorCampoValor.text);
                if (numeroConta != null && valor != null) {
                  final transferenciaCriada = Transferencia(valor, numeroConta);
                  debugPrint('$transferenciaCriada');
                }
              },
            )
          ],
        ));
  }
}

class ListaTransferencias extends StatelessWidget {
  const ListaTransferencias({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Transferências'),
      ),
      body: Column(
        children: <Widget>[
          ItemTransferencia(Transferencia(100.0, 1000)),
          ItemTransferencia(Transferencia(200.0, 2000)),
          ItemTransferencia(Transferencia(300.0, 3000)),
        ],
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {},
        child: Icon(Icons.add),
      ),
    );
  }
}

class ItemTransferencia extends StatelessWidget {
  final Transferencia _transferencia;

  ItemTransferencia(this._transferencia);

  @override
  Widget build(BuildContext context) {
    return Card(
        child: ListTile(
      leading: const Icon(Icons.monetization_on),
      title: Text(_transferencia.valor.toString()),
      subtitle: Text(_transferencia.numeroConta.toString()),
    ));
  }
}

class Transferencia {
  final double valor;
  final int numeroConta;

  Transferencia(this.valor, this.numeroConta);

  @override
  String toString() {
    return 'Transferencia{valor: $valor, numeroConta: $numeroConta}';
  }
}