diff --git a/app/controllers/statistics_controller.rb b/app/controllers/statistics_controller.rb
index 00a2ac8..c4377ef 100644
--- a/app/controllers/statistics_controller.rb
+++ b/app/controllers/statistics_controller.rb
@@ -110,7 +110,7 @@ def cache_key_for_status
       latest_update = [
         Refugee.maximum(:updated_at),
         Home.maximum(:updated_at),
-        Placement.maximum(:updated_at)].sort.last.try(:utc).try(:to_s, :number)
+        Placement.maximum(:updated_at)].reject(&:blank?).sort.last.try(:utc).try(:to_s, :number)
       "status/index-#{Date.today.to_s}-#{count}-#{latest_update}"
   end
 end