diff --git a/plugins/automation/db/migrate/20241219222326_add_trigger_on_field_default_value_to_topic_tags_changed_trigger.rb b/plugins/automation/db/migrate/20241219222326_add_trigger_on_field_default_value_to_topic_tags_changed_trigger.rb
new file mode 100644
index 00000000000..a4a9dca95f8
--- /dev/null
+++ b/plugins/automation/db/migrate/20241219222326_add_trigger_on_field_default_value_to_topic_tags_changed_trigger.rb
@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+class AddTriggerOnFieldDefaultValueToTopicTagsChangedTrigger < ActiveRecord::Migration[7.2]
+  def up
+    create_automation_field = <<~SQL
+              INSERT INTO discourse_automation_fields (automation_id, name, component, metadata, target, created_at, updated_at)
+              VALUES (:automation_id, 'trigger_on', 'choices', :metadata, 'script', NOW(), NOW())
+        SQL
+
+    topic_tags_changed_enabled_automations_without_trigger_on_field = DB.query <<~SQL
+    SELECT discourse_automation_automations.*
+    FROM discourse_automation_automations
+    WHERE discourse_automation_automations.trigger = 'topic_tags_changed'
+    AND discourse_automation_automations.enabled = TRUE
+    AND NOT EXISTS
+      (SELECT 1
+       FROM discourse_automation_fields
+       WHERE automation_id = discourse_automation_automations.id
+       AND name = 'trigger_on')
+    SQL
+
+    topic_tags_changed_enabled_automations_without_trigger_on_field.each do |automation|
+      DB.exec(
+        create_automation_field,
+        automation_id: automation.id,
+        metadata: { "value" => "tags_added_or_removed" }.to_json,
+      )
+    end
+  end
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
+end