Nette 2.1, setPrompt() on select doesnt work if you do not choose any value

[matak]

addDynamic('_addItems', function (Container $item) use ($itemsIdWarehouse, $itemsAttribute) { $item->addSelect('idWarehouse', NULL, $itemsIdWarehouse) ->setDefaultValue(key($itemsIdWarehouse)); $item->addSelect('attribute', NULL, $itemsAttribute) ->setPrompt("-"); $item->addText('samples'); $item->addText('quantity'); $item->addText('date'); }, 1); ``` ?>

the result is error

The signal receiver component 'form' is not found.

because

Nette\InvalidArgumentException

Value '' is out of allowed range ['36', '37', '38', '39', '40'] in field 'attribute'.

...vendor\kdyby\forms-replicator\src\Kdyby\Replicator\Container.php:233 source Nette\Forms\Container-> setValues (arguments)

return parent::setValues($values, $erase);