# EmissionWeightIndexDuplicated (/docs/errors/chain/EmissionWeightIndexDuplicated)

`sudo_set_subnet_emission_weights` listed the same slot index twice in `uids`. Give each slot at most once per call.

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

Declared at [`pallets/subtensor/src/macros/errors.rs#L426`](/code/pallets/subtensor/src/macros/errors.rs#L426).

## Remediation [#remediation]

Check the argument values against the operation schema

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