---
title: V4.9.13
description: FastGPT V4.9.13 Release Notes
---

## Upgrade Guide

### 1. Update Images:

- Update FastGPT image tag: v4.9.13
- Update FastGPT Pro image tag: v4.9.13
- mcp_server: no update required
- Sandbox: no update required
- AIProxy: no update required


## New Features

1. Subscription plan caching to reduce MongoDB query frequency.

## Improvements

1. All NodeId random value generation adjusted to avoid starting with a digit.
2. Knowledge base collection search now supports nested search.

## Bug Fixes

1. Chat log date range selection issues.
2. System prompt potentially being duplicated when passed via API calls.
3. AI chat/tool calls reading files from history even when no file link was selected.
4. Manually updating knowledge base indexes incorrectly deleting old indexes, causing manual indexes to become ineffective.