# InvalidSpecName (/docs/errors/chain/InvalidSpecName)

The new runtime's `spec_name` does not match the current runtime, so `set_code` refuses the upgrade. Check the `RuntimeVersion` embedded in the new wasm and ensure the spec name is identical to the chain's current one.

Declared by the `System` 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 InvalidSpecName`.