---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/59101#article
headline: "59101: System Resource Cannot Be Modified"
url: https://www.twilio.com/docs/api/errors/59101
inLanguage: en
dateModified: 2026-08-18T11:08:51.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 59101: System Resource Cannot Be Modified

Log Type: APPLICATION

Log Level: ERROR

## Description

The `Setting` resource you tried to update or delete was created by Twilio (`type: SYSTEM`) rather than by your account, and system-created `Settings` cannot be modified or deleted.

### Possible causes

* A `PATCH` or `DELETE` request was sent for a `Setting` whose `type` field is `SYSTEM`.

### Possible solutions

* Fetch the `Setting` (`GET /v2/Webhooks/Settings/{settingId}`) and check its `type` field before attempting to modify or delete it.
* To change configuration, create a new `Setting` resource with your desired configuration, update the relevant `Rule` to point to the new `Setting`, and leave the system `Setting` in place.