# OrderNonceUsed (/docs/errors/chain/OrderNonceUsed)

The nonce was already used or names different order bytes. For a new approval, choose a nonce greater than ApprovedOrders.highest\_nonce; cancellation and expiry do not reset that watermark.

Declared by the `LimitOrders` pallet; it classifies to the semantic code [`already_exists`](/docs/errors/already-exists).

Declared at [`pallets/limit-orders/src/lib.rs#L544`](/code/pallets/limit-orders/src/lib.rs#L544).

## Remediation [#remediation]

The object or state already exists; treat the goal as met or pick a different target

The same explanation is available in the terminal: `btcli explain OrderNonceUsed`.