Rule::requiredIf(!$this->libraryItem->id)

app/Http/Livewire/News/Form/NewsArticleForm.php

@@ -67,8 +67,10 @@ class NewsArticleForm extends Component
         $this->validate();
         $this->libraryItem->save();
 
+        if ($this->image) {
             $this->libraryItem->addMedia($this->image)
                               ->toMediaCollection('main');
+        }
 
         return to_route('article.overview', ['country' => null]);
     }