---
title: Error 10028 · Cloudflare Support docs
description: This error indicates that the operation to add items to a list
  contains duplicate entries within the same request.
lastUpdated: 2025-05-16T13:10:20.000Z
chatbotDeprioritize: false
source_url:
  html: https://developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-10xxx-errors/error-10028/
  md: https://developers.cloudflare.com/support/troubleshooting/http-status-codes/cloudflare-10xxx-errors/error-10028/index.md
---

## Error 10028: The add list items operation contains duplicate items

This error indicates that the operation to add items to a list contains duplicate entries within the same request.

### Common causes

This error occurs when there are duplicate list items in a single operation to add items to a List (either an IP list or a Bulk Redirect List). This error can happen when you:

* Add a repeated IP address to an IP list
* Add a repeated source URL to a Bulk Redirect List

### Resolution

You need to remove the duplicate item and try again.
