diff --git a/apps/tag/migrations/0005_tagcategory_name_indexing.py b/apps/tag/migrations/0005_tagcategory_name_indexing.py
index 7fcb7f0f..2547481a 100644
--- a/apps/tag/migrations/0005_tagcategory_name_indexing.py
+++ b/apps/tag/migrations/0005_tagcategory_name_indexing.py
@@ -13,6 +13,6 @@ class Migration(migrations.Migration):
         migrations.AddField(
             model_name='tagcategory',
             name='index_name',
-            field=models.CharField(blank=True, max_length=255, null=True, verbose_name='indexing name'),
+            field=models.CharField(blank=True, max_length=255, null=True, verbose_name='indexing name', unique=True),
         ),
     ]
diff --git a/apps/tag/models.py b/apps/tag/models.py
index 6e7ec65e..1ee594ad 100644
--- a/apps/tag/models.py
+++ b/apps/tag/models.py
@@ -70,7 +70,7 @@ class TagCategory(TranslatedFieldsMixin, models.Model):
                                 default=None)
     public = models.BooleanField(default=False)
     index_name = models.CharField(max_length=255, blank=True, null=True,
-                                     verbose_name=_('indexing name'), unique=True)
+                                verbose_name=_('indexing name'), unique=True)
 
     objects = TagCategoryQuerySet.as_manager()