409 already_member - NoResponse docs

{
  "type": "https://docs.noresponse.org/problems/already-member",
  "title": "Already a member",
  "status": 409,
  "detail": "The user is already an active member of this workspace.",
  "code": "already_member",
  "request_id": "5e8be3a91fde9499f7ce48ae66290895"
}

{
  "type": "https://docs.noresponse.org/problems/already-member",
  "title": "Already a member",
  "status": 409,
  "detail": "The user is already an active member of this workspace.",
  "code": "already_member",
  "request_id": "5e8be3a91fde9499f7ce48ae66290895"
}

HTTP 409 Not retryable

What to do

Read the member directory. Change the existing member’s access if needed instead of creating another invitation.

In the SDKs

The Node and Python SDKs raise ConflictError. The Go SDK returns *apierrors.ConflictError, which you match with errors.As.

{
  "type": "https://docs.noresponse.org/problems/already-member",
  "title": "Already a member",
  "status": 409,
  "detail": "The user is already an active member of this workspace.",
  "code": "already_member",
  "request_id": "5e8be3a91fde9499f7ce48ae66290895"
}

Every error has this shape. Errors and limits lists every code.