---
page_type: error
code: 50440
message: "50440: Failed to remove the proxy address of a participant."
level: ERROR
product: Programmable Chat
---

## Description

The conversation participant being updated does not have a proxy address.

### Possible Causes

- The participant does not have a proxy address you are trying to remove.
- The participant you are updating is not an SMS participant.

### Possible Solutions

- Check that the request does not update proxy address of this particular participant.