Group Participant already exists

A participant matching this one already exists in the conversation.

• 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.

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