diff --git a/lib/active_scaffold/helpers/controller_helpers.rb b/lib/active_scaffold/helpers/controller_helpers.rb
index <HASH>..<HASH> 100644
--- a/lib/active_scaffold/helpers/controller_helpers.rb
+++ b/lib/active_scaffold/helpers/controller_helpers.rb
@@ -29,7 +29,6 @@ module ActiveScaffold
           parameters[:eid] = params[:parent_controller]
         end
         parameters[:nested] = nil
-        parameters[:parent_model] = nil
         parameters[:parent_column] = nil
         parameters[:parent_id] = nil
         parameters[:action] = "index"
Fix returning to nested scaffold with polymorphic constraint