diff --git a/boards/migrations/0027_image_field_to_model.py b/boards/migrations/0027_image_field_to_model.py
--- a/boards/migrations/0027_image_field_to_model.py
+++ b/boards/migrations/0027_image_field_to_model.py
@@ -23,8 +23,8 @@ class Migration(DataMigration):
 
                 image.save()
 
+                post.images.clear()
                 post.images.add(image)
-                post.save()
 
     def backwards(self, orm):
         "Write your backwards methods here."