@@ -76,11 +76,14 @@ class NeuronModel(BaseModel, OrderedModel):
 
     @property
     def settings(self) -> 'ModelSettings':
-        return self.model_settings
+        try:
+            return self.model_settings
+        except ModelSettings.DoesNotExist:
+            return None
 
     @property
     def blocked(self) -> bool:
-        return self.inputs.count() > 0 and self.settings and self.settings.is_active
+        return bool(self.settings) and self.settings.is_active and self.inputs.count() > 0
 
     def __str__(self):
         return self.title
@@ -50,7 +50,7 @@ class NeuronModelSerializer(serializers.ModelSerializer):
 
 
 class NeuronModelsSerializer(serializers.ModelSerializer):
-    blocked = serializers.BooleanField(source='blocked')
+    blocked = serializers.BooleanField()
 
     class Meta:
         model = NeuronModel