Surface: Authentication API · application/problem+json Type URI: https://docs.zeroset.com/problems/invitation_existing_member Code: invitation_existing_member HTTP status: 409

The invitation could not be created because its target already belongs to the organization.

Resolving it

Adjust the existing membership instead of issuing an invitation.

Response shape

{
  "type": "https://docs.zeroset.com/problems/invitation_existing_member",
  "title": "Invitation target is already a member",
  "status": 409,
  "code": "invitation_existing_member",
  "detail": "a human-readable explanation"
}

Every field is required. Clients must reject an authentication problem whose type is not exactly the expansion shown above — the Nebula SDKs do.