How do I disable the Auto-saving of Form field relationships?

public function form(Form $form): Form
{
    return $form
        ->schema([
            Forms\Components\Section::make('General')
                ->schema([
                    Forms\Components\Select::make('account_id')
                        ->label('Account')
                        ->relationship('account', 'name')
                        ->searchable()
                        ->preload()
                        ->nullable(),
                    Forms\Components\Select::make('currency_code')
                        ->label('Currency')
                        ->relationship('currency', 'code')
                        ->searchable()
                        ->preload()
                        ->nullable(),
                ])->columns(),
            // More fields...
        ]);
}

Forms\Components\Select::make('currency_code')
    ->label('Currency')
    ->relationship('currency', 'code')
    ->saveRelationshipsUsing(null) // Here
    ->searchable()
    ->preload()
    ->nullable(),