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---
title: V4.5.1 (Includes Migration Script)
description: FastGPT V4.5.1 Update
---
## Run the Initialization API
Send 1 HTTP request (replace `{{rootkey}}` with the `rootkey` from your environment variables, and `{{host}}` with your domain).
1. https://xxxxx/api/admin/initv451
```bash
curl --location --request POST 'https://{{host}}/api/admin/initv451' \
--header 'rootkey: {{rootkey}}' \
--header 'Content-Type: application/json'
```
What the initialization does:
1. Renames database fields.
2. Initializes knowledge base-related fields in the Mongo APP collection.
3. Initializes PG and Mongo content — creates a collection in Mongo for each file and assigns the references back to PG.
**This initialization endpoint may be very slow. If the request times out, don't worry — just check the logs.**
## What's New
### Fast GPT V4.5.1
1. New - Knowledge base folder management.
2. Fixed - OpenAI 4.x SDK incompatibility with OneAPI's Zhipu and Alibaba interfaces.
3. Fixed - Some nodes failing to trigger completion events.