diff --git a/apps/gallery/migrations/0007_auto_20191211_1528.py b/apps/gallery/migrations/0007_auto_20191211_1528.py
new file mode 100644
index 00000000..714ef664
--- /dev/null
+++ b/apps/gallery/migrations/0007_auto_20191211_1528.py
@@ -0,0 +1,17 @@
+# Generated by Django 2.2.7 on 2019-12-11 15:28
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('gallery', '0006_merge_20191027_1758'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='image',
+            options={'ordering': ['-modified'], 'verbose_name': 'Image', 'verbose_name_plural': 'Images'},
+        ),
+    ]
diff --git a/apps/gallery/models.py b/apps/gallery/models.py
index baed48fc..22c5b5e7 100644
--- a/apps/gallery/models.py
+++ b/apps/gallery/models.py
@@ -34,6 +34,7 @@ class Image(ProjectBaseMixin, SORLImageMixin, PlatformMixin):
         """Meta class."""
         verbose_name = _('Image')
         verbose_name_plural = _('Images')
+        ordering = ['-modified']
 
     def __str__(self):
         """String representation"""
diff --git a/apps/news/migrations/0041_auto_20191211_1528.py b/apps/news/migrations/0041_auto_20191211_1528.py
new file mode 100644
index 00000000..0093d406
--- /dev/null
+++ b/apps/news/migrations/0041_auto_20191211_1528.py
@@ -0,0 +1,18 @@
+# Generated by Django 2.2.7 on 2019-12-11 15:28
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('gallery', '0007_auto_20191211_1528'),
+        ('news', '0040_remove_news_slug'),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name='newsgallery',
+            unique_together={('news', 'image')},
+        ),
+    ]
diff --git a/apps/news/models.py b/apps/news/models.py
index f54378b6..b4e1b5d5 100644
--- a/apps/news/models.py
+++ b/apps/news/models.py
@@ -320,4 +320,4 @@ class NewsGallery(IntermediateGalleryModelMixin):
         """NewsGallery meta class."""
         verbose_name = _('news gallery')
         verbose_name_plural = _('news galleries')
-        unique_together = (('news', 'is_main'), ('news', 'image'))
+        unique_together = [['news', 'image'],]
diff --git a/apps/news/serializers.py b/apps/news/serializers.py
index b45bfa3f..41b6ebc4 100644
--- a/apps/news/serializers.py
+++ b/apps/news/serializers.py
@@ -246,10 +246,11 @@ class NewsBackOfficeGallerySerializer(serializers.ModelSerializer):
     def create(self, validated_data):
         news_pk = self.get_request_kwargs().get('pk')
         image_id = self.get_request_kwargs().get('image_id')
-        news_gallery_model = models.NewsGallery.objects.filter(image_id=image_id, news_id=news_pk).first()
-        if news_gallery_model:
-            news_gallery_model.update(**validated_data)
-            return news_gallery_model
+        qs = models.NewsGallery.objects.filter(image_id=image_id, news_id=news_pk)
+        instance = qs.first()
+        if instance:
+            qs.update(**validated_data)
+            return instance
         return super().create(validated_data)
 
     def validate(self, attrs):
@@ -268,8 +269,8 @@ class NewsBackOfficeGallerySerializer(serializers.ModelSerializer):
         news = news_qs.first()
         image = image_qs.first()
 
-        if image in news.gallery.all():
-            raise serializers.ValidationError({'detail': _('Image is already added.')})
+        # if image in news.gallery.all():
+        #     raise serializers.ValidationError({'detail': _('Image is already added.')})
 
         attrs['news'] = news
         attrs['image'] = image