Anti-spam and limits
The anti-spam proof was already used
pow_challenge_used
The proof-of-work challenge can only be spent once.
HTTP 409·Anti-spam and limits
What it means
What happened
The proof-of-work challenge can only be spent once.
Why
Why it might have happened
- The publish request may have been submitted twice.
- A tool may have retried with the same proof.
Next steps
What you can try
- Try publishing again so a new proof is created.
- Avoid double-clicking or retrying the same request manually.
- Update the tool if it keeps reusing proofs.
Related
Related error help
Still stuck?
Get help
If the error keeps happening, send feedback or contact us and include pow_challenge_used plus what you were trying to do.