diff --git a/app/Repositories/Shop/ArticleTags.php b/app/Repositories/Shop/ArticleTags.php
index 053e3e76..4d84f437 100644
--- a/app/Repositories/Shop/ArticleTags.php
+++ b/app/Repositories/Shop/ArticleTags.php
@@ -27,21 +27,34 @@ class ArticleTags
 
         switch ($article->product_type) {
             case 'App\Models\Botanic\Variety':
-                $data += $article->product->tags->toArray();
-                if ($article->product->specie ?? false) {
-                    $data += $article->product->specie->tags->toArray();
+                $variety = $article->product;
+                if ($variety && $variety->tags) {
+                    $data = array_merge($data, $variety->tags->toArray());
+                }
+                if ($variety && $variety->specie && $variety->specie->tags) {
+                    $data = array_merge($data, $variety->specie->tags->toArray());
                 }
                 break;
             case 'App\Models\Botanic\Specie':
-                $data += $article->product->tags->toArray();
+                $specie = $article->product;
+                if ($specie && $specie->tags) {
+                    $data = array_merge($data, $specie->tags->toArray());
+                }
                 break;
             case 'App\Models\Shop\Merchandise':
-                $data += $article->product->tags->toArray();
-                $data += $article->product->producer->tags->toArray();
+                $merchandise = $article->product;
+                if ($merchandise && $merchandise->tags) {
+                    $data = array_merge($data, $merchandise->tags->toArray());
+                }
+                if ($merchandise && $merchandise->producer && $merchandise->producer->tags) {
+                    $data = array_merge($data, $merchandise->producer->tags->toArray());
+                }
                 break;
             default:
         }
-        $data += $article->tags->toArray();
+        if ($article->tags) {
+            $data = array_merge($data, $article->tags->toArray());
+        }
 
         foreach ($data as $tag) {
             if (! isset($tags[$tag['group']][$tag['name']])) {
diff --git a/app/Repositories/Shop/Articles.php b/app/Repositories/Shop/Articles.php
index fe0cf1ea..354f1cad 100644
--- a/app/Repositories/Shop/Articles.php
+++ b/app/Repositories/Shop/Articles.php
@@ -135,8 +135,11 @@ class Articles
                 $data['specie'] = $article->product ? $article->product->description : '';
                 break;
             case 'App\Models\Shop\Merchandise':
-                $data['merchandise'] = $article->product ? $article->product->description : '';
-                $data['producer'] = $article->product->producer->description;
+                $merchandise = $article->product;
+                $data['merchandise'] = $merchandise ? ($merchandise->description ?? '') : '';
+                if ($merchandise && $merchandise->producer) {
+                    $data['producer'] = $merchandise->producer->description ?? '';
+                }
                 break;
             default:
         }