feat: improved validation of personal data

src/Form/PersonalDataType.php

@@ -38,6 +38,7 @@ class PersonalDataType extends AbstractType
             ])
             ->add('phone', TextType::class, [
                 'label' => 'Telefon',
+                'required' => false,
                 'property_path' => 'communication.phone',
             ])
             ->add('mobile', TextType::class, [