diff --git a/celerybeat-schedule b/celerybeat-schedule
index bccb29106..12caa11af 100644
Binary files a/celerybeat-schedule and b/celerybeat-schedule differ
diff --git a/uber/models/mits.py b/uber/models/mits.py
index 67b3f7fe6..a1d0d7932 100644
--- a/uber/models/mits.py
+++ b/uber/models/mits.py
@@ -223,10 +223,12 @@ def guidebook_images(self):
 
         header = self.guidebook_header
         thumbnail = self.guidebook_thumbnail
-
         prepend = sluggify(self.name) + '_'
 
-        return [prepend + header.filename, prepend + thumbnail.filename], [header, thumbnail]
+        header_name = (prepend + header.filename) if header else ''
+        thumbnail_name = (prepend + thumbnail.filename) if thumbnail else ''
+        
+        return [header_name, thumbnail_name], [header, thumbnail]
 
 
 class MITSPicture(MagModel):
diff --git a/uber/models/mivs.py b/uber/models/mivs.py
index a080e173f..8198380b4 100644
--- a/uber/models/mivs.py
+++ b/uber/models/mivs.py
@@ -515,7 +515,10 @@ def guidebook_images(self):
         thumbnail = self.guidebook_thumbnail
         prepend = sluggify(self.title) + '_'
 
-        return [prepend + header.filename, prepend + thumbnail.filename], [header, thumbnail]
+        header_name = (prepend + header.filename) if header else ''
+        thumbnail_name = (prepend + thumbnail.filename) if thumbnail else ''
+        
+        return [header_name, thumbnail_name], [header, thumbnail]
 
 
 class IndieGameImage(MagModel):