diff --git a/app/models/variant_override_set.rb b/app/models/variant_override_set.rb
index c64b4cdc32..d380df4144 100644
--- a/app/models/variant_override_set.rb
+++ b/app/models/variant_override_set.rb
@@ -15,8 +15,10 @@ class VariantOverrideSet < ModelSet
       tag_list.empty?
   end
 
+  # Override of ModelSet method to allow us to check presence of a tag_list (which is not an attribute)
+  # This method will delete VariantOverrides that have no values (see deletable? above)
+  #   If the user sets all values to nil in the UI the VO will be deleted from the DB
   def collection_to_delete
-    # Override of ModelSet method to allow us to check presence of a tag_list (which is not an attribute)
     deleted = []
     collection.delete_if { |e| deleted << e if @delete_if.andand.call(e.attributes, e.tag_list) }
     deleted