> ## Documentation Index
> Fetch the complete documentation index at: https://base-a060aa97-docs-add-b20-spec.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# IActivationRegistry.deactivate

> Generated B20 reference for deactivate(bytes32).

[Related concept](/base-chain/specs/upgrades/beryl/b20/specification/concepts/architecture-and-precompiles)

## Signature

```solidity theme={null}
function deactivate(bytes32 feature) external;
```

| Field               | Value                 |
| ------------------- | --------------------- |
| Selector            | `0x22eee84c`          |
| Canonical signature | `deactivate(bytes32)` |

## Description

Deactivates `feature`. Emits `FeatureDeactivated`.
Dev: Reverts with `DelegateCallNotAllowed` when invoked via `DELEGATECALL` or `CALLCODE`.
Dev: Reverts with `StaticCallNotAllowed` when invoked under `STATICCALL`.
Dev: Reverts with `Unauthorized` when the caller is not the activation admin.
Dev: Reverts with `AlreadyDeactivated` when `feature` is already deactivated.
Param: feature Feature to deactivate.

## Access control

Callable by the ActivationRegistry admin.

## Policy interaction

No direct policy interaction.

## Example

```solidity theme={null}
IActivationRegistry(target).deactivate(arg0);
```

## Related

* [IActivationRegistry reference](/base-chain/specs/upgrades/beryl/b20/specification/reference/interfaces/IActivationRegistry)
* [Constants & addresses](/base-chain/specs/upgrades/beryl/b20/specification/reference/constants-and-addresses)