drop extra key

config/application.rb

@@ -19,10 +19,14 @@ module DocuSeal
   class Application < Rails::Application
     config.load_defaults 8.1
 
-    # Rails 8.1.3 removed the has_many_inversing= setter on ActiveRecord::Base
-    # (the feature is now permanently enabled), but load_defaults still sets it
-    # via the 7.0 framework defaults, causing NoMethodError at boot.
-    config.active_record.delete(:has_many_inversing) if config.active_record.respond_to?(:delete)
+    # Rails 8.1.3 removed several ActiveRecord::Base= setters (the features are now
+    # permanently enabled), but load_defaults still sets them via older framework
+    # defaults, causing NoMethodError at boot. Drop them from config.active_record
+    # so the railtie does not attempt to assign them on AR::Base.
+    if config.active_record.respond_to?(:delete)
+      config.active_record.delete(:has_many_inversing)
+      config.active_record.delete(:belongs_to_required_by_default)
+    end
 
     config.autoload_lib(ignore: %w[assets tasks puma])