diff --git a/supabase/functions/process-selective-approval/index.ts b/supabase/functions/process-selective-approval/index.ts
index 6042f05f..f362735f 100644
--- a/supabase/functions/process-selective-approval/index.ts
+++ b/supabase/functions/process-selective-approval/index.ts
@@ -178,8 +178,7 @@ const handler = async (req: Request) => {
           p_item_ids: itemIds,
           p_moderator_id: user.id,
           p_submitter_id: submission.user_id,
-          p_request_id: requestId,
-          p_idempotency_key: idempotencyKey
+          p_request_id: requestId
         }
       );
 
diff --git a/supabase/migrations/20251108025615_15e575b0-4758-4498-ae64-27d2bad919fc.sql b/supabase/migrations/20251108025615_15e575b0-4758-4498-ae64-27d2bad919fc.sql
new file mode 100644
index 00000000..a93b01dc
--- /dev/null
+++ b/supabase/migrations/20251108025615_15e575b0-4758-4498-ae64-27d2bad919fc.sql
@@ -0,0 +1,146 @@
+-- ============================================================================
+-- Fix Timeline Event Updates and Deletes
+-- Adds support for timeline_event and milestone entity types
+-- ============================================================================
+
+-- Update function to support timeline event updates
+CREATE OR REPLACE FUNCTION update_entity_from_submission(
+  p_entity_type TEXT,
+  p_data JSONB,
+  p_entity_id UUID,
+  p_updated_by UUID
+)
+RETURNS UUID
+LANGUAGE plpgsql
+SECURITY DEFINER
+SET search_path = public
+AS $$
+BEGIN
+  CASE p_entity_type
+    WHEN 'park' THEN
+      UPDATE parks SET
+        name = COALESCE(p_data->>'name', name),
+        slug = COALESCE(p_data->>'slug', slug),
+        description = COALESCE(p_data->>'description', description),
+        park_type = COALESCE(p_data->>'park_type', park_type),
+        status = COALESCE(p_data->>'status', status),
+        location_id = COALESCE((p_data->>'location_id')::UUID, location_id),
+        operator_id = COALESCE((p_data->>'operator_id')::UUID, operator_id),
+        property_owner_id = COALESCE((p_data->>'property_owner_id')::UUID, property_owner_id),
+        opening_date = COALESCE((p_data->>'opening_date')::DATE, opening_date),
+        closing_date = COALESCE((p_data->>'closing_date')::DATE, closing_date),
+        opening_date_precision = COALESCE(p_data->>'opening_date_precision', opening_date_precision),
+        closing_date_precision = COALESCE(p_data->>'closing_date_precision', closing_date_precision),
+        website_url = COALESCE(p_data->>'website_url', website_url),
+        phone = COALESCE(p_data->>'phone', phone),
+        email = COALESCE(p_data->>'email', email),
+        banner_image_url = COALESCE(p_data->>'banner_image_url', banner_image_url),
+        banner_image_id = COALESCE(p_data->>'banner_image_id', banner_image_id),
+        card_image_url = COALESCE(p_data->>'card_image_url', card_image_url),
+        card_image_id = COALESCE(p_data->>'card_image_id', card_image_id),
+        updated_at = NOW()
+      WHERE id = p_entity_id;
+      
+    WHEN 'ride' THEN
+      UPDATE rides SET
+        name = COALESCE(p_data->>'name', name),
+        slug = COALESCE(p_data->>'slug', slug),
+        park_id = COALESCE((p_data->>'park_id')::UUID, park_id),
+        ride_type = COALESCE(p_data->>'ride_type', ride_type),
+        status = COALESCE(p_data->>'status', status),
+        manufacturer_id = COALESCE((p_data->>'manufacturer_id')::UUID, manufacturer_id),
+        ride_model_id = COALESCE((p_data->>'ride_model_id')::UUID, ride_model_id),
+        opening_date = COALESCE((p_data->>'opening_date')::DATE, opening_date),
+        closing_date = COALESCE((p_data->>'closing_date')::DATE, closing_date),
+        opening_date_precision = COALESCE(p_data->>'opening_date_precision', opening_date_precision),
+        closing_date_precision = COALESCE(p_data->>'closing_date_precision', closing_date_precision),
+        description = COALESCE(p_data->>'description', description),
+        banner_image_url = COALESCE(p_data->>'banner_image_url', banner_image_url),
+        banner_image_id = COALESCE(p_data->>'banner_image_id', banner_image_id),
+        card_image_url = COALESCE(p_data->>'card_image_url', card_image_url),
+        card_image_id = COALESCE(p_data->>'card_image_id', card_image_id),
+        updated_at = NOW()
+      WHERE id = p_entity_id;
+      
+    WHEN 'manufacturer', 'operator', 'property_owner', 'designer' THEN
+      UPDATE companies SET
+        name = COALESCE(p_data->>'name', name),
+        slug = COALESCE(p_data->>'slug', slug),
+        description = COALESCE(p_data->>'description', description),
+        website_url = COALESCE(p_data->>'website_url', website_url),
+        founded_year = COALESCE((p_data->>'founded_year')::INTEGER, founded_year),
+        banner_image_url = COALESCE(p_data->>'banner_image_url', banner_image_url),
+        banner_image_id = COALESCE(p_data->>'banner_image_id', banner_image_id),
+        card_image_url = COALESCE(p_data->>'card_image_url', card_image_url),
+        card_image_id = COALESCE(p_data->>'card_image_id', card_image_id),
+        updated_at = NOW()
+      WHERE id = p_entity_id;
+      
+    WHEN 'ride_model' THEN
+      UPDATE ride_models SET
+        name = COALESCE(p_data->>'name', name),
+        slug = COALESCE(p_data->>'slug', slug),
+        manufacturer_id = COALESCE((p_data->>'manufacturer_id')::UUID, manufacturer_id),
+        ride_type = COALESCE(p_data->>'ride_type', ride_type),
+        description = COALESCE(p_data->>'description', description),
+        banner_image_url = COALESCE(p_data->>'banner_image_url', banner_image_url),
+        banner_image_id = COALESCE(p_data->>'banner_image_id', banner_image_id),
+        card_image_url = COALESCE(p_data->>'card_image_url', card_image_url),
+        card_image_id = COALESCE(p_data->>'card_image_id', card_image_id),
+        updated_at = NOW()
+      WHERE id = p_entity_id;
+      
+    WHEN 'timeline_event', 'milestone' THEN
+      UPDATE entity_timeline_events SET
+        event_type = COALESCE(p_data->>'event_type', event_type),
+        event_date = COALESCE((p_data->>'event_date')::DATE, event_date),
+        event_date_precision = COALESCE(p_data->>'event_date_precision', event_date_precision),
+        title = COALESCE(p_data->>'title', title),
+        description = COALESCE(p_data->>'description', description),
+        from_value = COALESCE(p_data->>'from_value', from_value),
+        to_value = COALESCE(p_data->>'to_value', to_value),
+        from_entity_id = COALESCE((p_data->>'from_entity_id')::UUID, from_entity_id),
+        to_entity_id = COALESCE((p_data->>'to_entity_id')::UUID, to_entity_id),
+        from_location_id = COALESCE((p_data->>'from_location_id')::UUID, from_location_id),
+        to_location_id = COALESCE((p_data->>'to_location_id')::UUID, to_location_id),
+        updated_at = NOW()
+      WHERE id = p_entity_id;
+      
+    ELSE
+      RAISE EXCEPTION 'Unsupported entity type for update: %', p_entity_type
+        USING ERRCODE = '22023';
+  END CASE;
+  
+  RETURN p_entity_id;
+END;
+$$;
+
+-- Update function to support timeline event deletion
+CREATE OR REPLACE FUNCTION delete_entity_from_submission(
+  p_entity_type TEXT,
+  p_entity_id UUID,
+  p_deleted_by UUID
+)
+RETURNS VOID
+LANGUAGE plpgsql
+SECURITY DEFINER
+SET search_path = public
+AS $$
+BEGIN
+  CASE p_entity_type
+    WHEN 'park' THEN
+      DELETE FROM parks WHERE id = p_entity_id;
+    WHEN 'ride' THEN
+      DELETE FROM rides WHERE id = p_entity_id;
+    WHEN 'manufacturer', 'operator', 'property_owner', 'designer' THEN
+      DELETE FROM companies WHERE id = p_entity_id;
+    WHEN 'ride_model' THEN
+      DELETE FROM ride_models WHERE id = p_entity_id;
+    WHEN 'timeline_event', 'milestone' THEN
+      DELETE FROM entity_timeline_events WHERE id = p_entity_id;
+    ELSE
+      RAISE EXCEPTION 'Unsupported entity type for deletion: %', p_entity_type
+        USING ERRCODE = '22023';
+  END CASE;
+END;
+$$;
\ No newline at end of file