diff --git a/backend/experiment/forms.py b/backend/experiment/forms.py
index 8de489aee..8765398a3 100644
--- a/backend/experiment/forms.py
+++ b/backend/experiment/forms.py
@@ -182,6 +182,10 @@ def clean_playlists(self):
         rules = cl()
 
         playlists = self.cleaned_data['playlists']
+
+        if not playlists:
+            return self.cleaned_data['playlists']
+        
         playlist_errors = []
 
         # Validate playlists
@@ -194,6 +198,8 @@ def clean_playlists(self):
         if playlist_errors:
             self.add_error('playlists', playlist_errors)
 
+        return self.cleaned_data['playlists']
+
     class Meta:
         model = Experiment
         fields = ['name', 'slug', 'active', 'rules',