# Dify 0.3.31-fix3 — Release & Upgrade Intelligence
- **Product:** Dify (https://dify.ai)
- **Version:** 0.3.31-fix3
- **Released:** Nov 22, 2023
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/dify/updates/0.3.31-fix3/

## Executive Summary (TL;DR)
Dify 0.3.31-fix3. Source highlight: Fix: Hybrid search recall fails when the chosen dataset contains no valid documents.

## New Features
- feat: optimize db connections in thread
- feat: bump version to 0.3.31-fix3

## Bug Fixes
- Fix: Hybrid search recall fails when the chosen dataset contains no valid documents.
- fix sql transaction error in statistic API
- fix: chat token spent info style
- fix weaviate hybrid search issue
- fix: hybrid search when document is none
- Fix/multi thread parameter