# Changelog 2022 07 20

### Fixes & improvements

- API: Changed the error reported when a concurrent operation on a project prevents acquiring a project lock. Error `423 Locked` is now reported instead of `409 Conflict`.
- Control plane: Implemented the usage of several instances for serving the public API and web UI to enable zero-downtime deployments.
- UI: Added an **Enable pooling** toggle to the project **General setting** page, which permits enabling or disabling connection pooling for a project. For more information about Neon connection pooling support, see [Connection pooling](/guides/postgres-connect-connection-pooling).

## Related pages

- [AI tools for Agents](./ai-agents-on-neon-index.md)
- [APIs & SDKs](./apis-sdks-index.md)
- [Changelog](../changelog.md)
- [Integrating with Neon](./building-on-neon-index.md)
- [Lakebase Postgres](./postgres-index.md)
- [Managed Better Auth](./auth-index.md)
- [More](./more-index.md)
- [Neon AI Gateway](./ai-gateway-index.md)
- [Neon community](./community-index.md)
- [Neon documentation](./neon-docs-index.md)

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