Harmont docs
ApiErrors

passkey_not_found

No such passkey. It may have already been removed; reload and try again.

HTTP status404
typenot_found
codepasskey_not_found
Default messageNo such passkey. It may have already been removed; reload and try again.

When this happens

You tried to rename or delete a passkey by its id, but no passkey with that id exists on your account. This usually means the passkey was already removed — often from another tab or device — and the page you are looking at is stale.

How to fix it

Reload your passkey list so it reflects the current state, then retry against a passkey that still exists. If the entry keeps reappearing after a reload, sign out and back in to refresh your session.

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