diff --git a/app/models/concerns/account/associations.rb b/app/models/concerns/account/associations.rb
index 3040da01de..ec8766f709 100644
--- a/app/models/concerns/account/associations.rb
+++ b/app/models/concerns/account/associations.rb
@@ -19,6 +19,7 @@ module Account::Associations
     has_many :conversations, class_name: 'AccountConversation', dependent: :destroy, inverse_of: :account
     has_many :scheduled_statuses, inverse_of: :account, dependent: :destroy
     has_many :scheduled_expiration_statuses, inverse_of: :account, dependent: :destroy
+    has_many :ng_rule_histories, inverse_of: :account, dependent: :destroy
 
     # Notifications
     has_many :notifications, inverse_of: :account, dependent: :destroy
diff --git a/app/services/delete_account_service.rb b/app/services/delete_account_service.rb
index 0c90eeb82d..925b2efea6 100644
--- a/app/services/delete_account_service.rb
+++ b/app/services/delete_account_service.rb
@@ -170,6 +170,7 @@ class DeleteAccountService < BaseService
     purge_feeds!
     purge_other_associations!
 
+    remove_ng_rule_history_relations! unless keep_account_record?
     @account.destroy unless keep_account_record?
   end
 
@@ -273,6 +274,10 @@ class DeleteAccountService < BaseService
     @account.save!
   end
 
+  def remove_ng_rule_history_relations!
+    @account.ng_rule_histories.update_all(account_id: nil)
+  end
+
   def fulfill_deletion_request!
     @account.deletion_request&.destroy
   end