QUEUED_BLOCK_EXISTS

A plan is already queued to start after the current one.

HTTP status	409
Group	Pricing and purchase
Retryable	No — sending it again changes nothing

What happened

An account holds at most one queued plan block, so the next period is never ambiguous. A queued block cannot be cancelled.

What to do

Wait for the queued block to start, or buy a more expensive tier: an upgrade takes effect now and credits the queued block back to your account.

The problem document

Every error is application/problem+json (RFC 9457) with the same shape:

{
  "type": "https://docs.co-relayer.com/errors/queued-block-exists",
  "title": "A plan is already queued to start after the current one.",
  "status": 409,
  "detail": "A sentence about this specific occurrence.",
  "instance": "req_01JB…",
  "code": "QUEUED_BLOCK_EXISTS",
  "retryable": false,
  "hint": "Wait for the queued block to start, or buy a more expensive tier: an upgrade takes effect now and credits the queued block back to your account."
}

See the error model for what each member means and how to handle unknown codes.