# dbt Core v0.20.1 — Release & Upgrade Intelligence
- **Product:** dbt Core (https://www.getdbt.com)
- **Version:** v0.20.1
- **Released:** Aug 11, 2021
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/dbt-core/updates/v0.20.1/

## Executive Summary (TL;DR)
dbt Core v0.20.1. Source highlight: Adds `install-prerelease` parameter to hub packages in `packages.yml`. When set to `True`, allows prerelease packages to be installed. By default, this parameter is False unless explicitly set to True.

## New Features
- Adds `install-prerelease` parameter to hub packages in `packages.yml`. When set to `True`, allows prerelease packages to be installed. By default, this parameter is False unless explicitly set to True.
- Add tracking for determine why `dbt` needs to re-parse entire project when partial parsing is enabled (#3572, #3652)

## Bug Fixes
- Fix config merge behavior with experimental parser 3637
- Fix exception on yml files with all comments 3568
- Fix `store_failures` config when defined as a modifier for `unique` and `not_null` tests (#3575, #3577)
- Fix `where` config with `relationships` test by refactoring test SQL. Note: The default `relationships` test now includes CTEs, and may need reimplementing on adapters that don't support CTEs nested inside subqueries. (#3579, #3583)
- Partial parsing: don't reprocess SQL file already scheduled (#3589, #3620)
- Handle interator functions in model config (#3573)