# dbt Core v1.6.6 — Release & Upgrade Intelligence
- **Product:** dbt Core (https://www.getdbt.com)
- **Version:** v1.6.6
- **Released:** Oct 11, 2023
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/dbt-core/updates/v1.6.6/

## Executive Summary (TL;DR)
dbt Core v1.6.6. Source highlight: dbt-core 1.6.6 - October 11, 2023

## New Features
- Support `fill_nulls_with` and `join_to_timespine` for metric nodes (#8593)
- add a test for ephemeral cte injection (#8225)

## Bug Fixes
- Add connection status into list of statuses for dbt debug (#8350)
- Support global flags passed in after subcommands (#6497)
- Regenerate the v10 manifest jsonschema (#8763)
- Foreign key constraint on incremental model results in Database Error (#8022)
- Support docs blocks on versioned model column descriptions (#8540)
- Enable seeds to be handled from stored manifest data (#6875)