QSqlTableModel: can not update an already modified row

void printRecord(const QSqlRecord& record, const QString& msg)
{
    qDebug() << "Name:" << record.value("Name").toString() << "isGenerated :" <<
                (record.field("Name").isGenerated() ? "true " : "false") << "|" << msg; qDebug();
}
void printModel(const QSqlTableModel& model, const QString& msg)
{
    printRecord(model.record(0), msg);
}

void main()
{
    QCoreApplication app(argc, argv);
    QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
    db.setDatabaseName(":memory:");
    db.open();

    QSqlQuery query;
    query.exec("CREATE TABLE Person(Name TEXT);");
    query.exec("INSERT INTO Person (Name) VALUES ('John Green');");

    QSqlTableModel model(nullptr, db);
    model.setTable("Person");
    model.setEditStrategy(QSqlTableModel::OnManualSubmit);
    model.select(); printModel(model, "Model after select");

    qDebug() << "-------------------"; qDebug();

    auto record = model.record(0); printRecord(record, "Record retrieved first time");
    model.setRecord(0, record); printModel(model, "Model after setRecord first time");

    qDebug() << "-------------------"; qDebug();
#if 0
    record = model.record(0); printRecord(record, "Record retrieved second time");
    model.setRecord(0, record); printModel(model, "Model after setRecord second time");

    qDebug() << "-------------------"; qDebug();
#endif
    record.setValue("Name", "Andy Brown"); printRecord(record, "Record modified");
    model.setRecord(0, record); printModel(model, "Model after setRecord after modifying record");

    qDebug() << "-------------------"; qDebug();

    if (!model.submitAll())
        qDebug() << model.lastError();
    printModel(model, "Model after submitAll");

    query.exec("SELECT * FROM Person;");
    query.next();
    qDebug() << "Content of DB Table \"Name\":" << query.value("Name").toString();
    qDebug();
    return 0;
}