diff --git a/lib/scripts/sankey_data_generator.rb b/lib/scripts/sankey_data_generator.rb
index c1f273137..dda2f7df6 100644
--- a/lib/scripts/sankey_data_generator.rb
+++ b/lib/scripts/sankey_data_generator.rb
@@ -24,7 +24,7 @@ class SankeyDataGenerator
   private
 
   def base_scope
-    ReportingEvent.where(account_id: @account_id).where('created_at >= ?', @days.days.ago)
+    ReportingEvent.where(account_id: @account_id).where('conversation_created_at >= ?', @days.days.ago)
   end
 
   def conversation_created