diff --git a/lib/column_dropper.rb b/lib/column_dropper.rb
index 2cfc81c3175..7c77a25331c 100644
--- a/lib/column_dropper.rb
+++ b/lib/column_dropper.rb
@@ -38,6 +38,8 @@ class ColumnDropper
         DROP TRIGGER IF EXISTS #{readonly_trigger_name(table, column)} ON #{table};
         SQL
       end
+
+      Discourse.reset_active_record_cache
     end
   end