# IncorrectWeightVersionKey (/docs/errors/chain/IncorrectWeightVersionKey)

The `version_key` supplied with set\_weights is older than the subnet's required weights version. Compare it against the `WeightsVersionKey` hyperparameter (`btcli sudo get --netuid <n>`) and update the validator software or the key.

Declared by the `SubtensorModule` 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 IncorrectWeightVersionKey`.