---
page_type: error
code: 50437
message: "50437: Group Participant already exists"
level: ERROR
product: Programmable Chat
---

## Description

A participant matching this one already exists in the conversation.

### Possible Causes

- An participant with the same ProxyAddress+Address pair already exists in this conversation
- A native GMMS Participant with the same Address exists in this conversation
- A Chat Participant with the same Identity and Project Address exists in this conversation

This error may result from a race condition, where a participant was inadvertently added twice.

### Possible Solutions

- Add the participant with a different Address or Identity
- Ignore this error — your participant is already present.