fix: show missing fields' label in flash message

src/Form/AccommodationStep2Type.php

@@ -36,7 +36,7 @@ class AccommodationStep2Type extends AbstractType
                 'attr' => ['min' => 0],
             ])
             ->add('selectedBoardServiceId', ChoiceType::class, [
-                'label' => false,
+                'label' => 'Verpflegungsleistung',
                 'choices' => $options['board_service_choices'],
                 'expanded' => true,
                 'multiple' => false,