diff --git a/app/models/group/ortsgruppe.rb b/app/models/group/ortsgruppe.rb
index 1fd3d839f..247cc050e 100644
--- a/app/models/group/ortsgruppe.rb
+++ b/app/models/group/ortsgruppe.rb
@@ -32,4 +32,8 @@ class Group::Ortsgruppe < Group
   mounted_attr :mitglied_termination_by_section_only, :boolean, default: false, null: false
 
   has_many :sac_section_membership_configs, dependent: :destroy, foreign_key: :group_id
+
+  def active_sac_section_membership_config
+    @active_sac_section_membership_config ||= sac_section_membership_configs.active
+  end
 end
diff --git a/app/resources/sac_cas/group_resource.rb b/app/resources/sac_cas/group_resource.rb
index fdfade25a..3bbc09912 100644
--- a/app/resources/sac_cas/group_resource.rb
+++ b/app/resources/sac_cas/group_resource.rb
@@ -57,8 +57,8 @@ module SacCas::GroupResource
       attr = [prefix, suffix].join("_")
 
       extra_attribute attr.to_sym, :big_decimal, writable: false, sortable: false do
-        next unless @object.respond_to?(:sac_section_membership_configs)
-        @object.active_sac_section_membership_config.send(attr)
+        next unless @object.respond_to?(:active_sac_section_membership_config)
+        @object.active_sac_section_membership_config&.send(attr)
       end
     end
   end