---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/51109#article
headline: "51109: Twilsock: Service instance is under legal hold"
url: https://www.twilio.com/docs/api/errors/51109
inLanguage: en
dateModified: 2026-06-09T11:00:42.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 51109: Twilsock: Service instance is under legal hold

Log Level: ERROR

## Description

The requested operation could not be completed because the target service instance is under legal hold. When a service instance is under legal hold, you cannot perform actions that would modify or remove data associated with that instance.

### Possible causes

* You attempted to update or delete data in a service instance that has been placed under legal hold.
* Your application is using a service instance SID that is no longer available for write operations because of a legal or compliance restriction.
* The request targets a Twilio service used by Twilsock-backed products, such as Conversations, Sync, or Programmable Chat, and that service instance is currently restricted.

### Possible solutions

* Use a different service instance that is active and not under legal hold.
* Review your application configuration and confirm that you are sending requests to the correct service instance SID.
* Avoid update or delete operations on the affected service instance until the legal hold is lifted.
* If you do not expect the service instance to be under legal hold, contact your account administrator to confirm the instance status and intended usage.

#### Additional resources

* [Twilio Conversations documentation](/docs/conversations)
* [Twilio Sync documentation](/docs/sync)
* [Programmable Chat documentation](/docs/chat)