diff --git a/app/models/namespace_setting.rb b/app/models/namespace_setting.rb
index 0b343338911a47021526abcc0d2033aed1b0c556..b085270b1cab6566ddb3d3f29f8acbd53d9ae1d1 100644
--- a/app/models/namespace_setting.rb
+++ b/app/models/namespace_setting.rb
@@ -10,6 +10,7 @@ class NamespaceSetting < ApplicationRecord
   columns_changing_default :require_dpop_for_manage_api_endpoints
 
   ignore_column :token_expiry_notify_inherited, remove_with: '17.9', remove_after: '2025-01-11'
+  ignore_column :enable_auto_assign_gitlab_duo_pro_seats, remove_with: '18.5', remove_after: '2025-08-16'
   enum :pipeline_variables_default_role, ProjectCiCdSetting::PIPELINE_VARIABLES_OVERRIDE_ROLES, prefix: true
 
   ignore_column :third_party_ai_features_enabled, remove_with: '16.11', remove_after: '2024-04-18'
diff --git a/db/post_migrate/20250704084854_remove_auto_assign_duo_pro_namespace_settings.rb b/db/post_migrate/20250704084854_remove_auto_assign_duo_pro_namespace_settings.rb
new file mode 100644
index 0000000000000000000000000000000000000000..8457bb5c48958d73f9f7c8f05c13369e933874ac
--- /dev/null
+++ b/db/post_migrate/20250704084854_remove_auto_assign_duo_pro_namespace_settings.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+class RemoveAutoAssignDuoProNamespaceSettings < Gitlab::Database::Migration[2.3]
+  milestone '18.2'
+
+  def change
+    remove_column :namespace_settings,
+      :enable_auto_assign_gitlab_duo_pro_seats,
+      :boolean,
+      default: false,
+      null: false,
+      if_exists: true
+  end
+end
diff --git a/db/schema_migrations/20250704084854 b/db/schema_migrations/20250704084854
new file mode 100644
index 0000000000000000000000000000000000000000..5aec12b7e45838102d12637e7e750360f5e62cf1
--- /dev/null
+++ b/db/schema_migrations/20250704084854
@@ -0,0 +1 @@
+c7ae95fb19f00f9500332b311816c0b366471646745a63ef0998d9b7d3440d06
\ No newline at end of file
diff --git a/db/structure.sql b/db/structure.sql
index 25bb90ea57e8b8bfb7d176327f5af2c251cf1156..4c4c3b45f736b9af4b8e634dc16038202ee72a4c 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -18464,7 +18464,6 @@ CREATE TABLE namespace_settings (
     duo_features_enabled boolean,
     lock_duo_features_enabled boolean DEFAULT false NOT NULL,
     disable_personal_access_tokens boolean DEFAULT false NOT NULL,
-    enable_auto_assign_gitlab_duo_pro_seats boolean DEFAULT false NOT NULL,
     early_access_program_participant boolean DEFAULT false NOT NULL,
     remove_dormant_members boolean DEFAULT false NOT NULL,
     remove_dormant_members_period integer DEFAULT 90 NOT NULL,