# DuplicateOrderInBatch (/docs/errors/chain/DuplicateOrderInBatch)

Two entries in one `execute_batched_orders` call hash to the same order id, meaning the identical signed payload was included twice, which hard-fails the batch. Deduplicate by the blake2-256 hash of each SCALE-encoded `VersionedOrder`.

Declared by the `LimitOrders` pallet; it classifies to the semantic code [`invalid_argument`](/docs/errors/invalid-argument).

## Remediation [#remediation]

Check the argument values against the operation schema

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