# Saleor 3.21.20 — Release & Upgrade Intelligence
- **Product:** Saleor (https://saleor.io)
- **Version:** 3.21.20
- **Released:** Sep 23, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/saleor/updates/3.21.20/

## Executive Summary (TL;DR)
Saleor 3.21.20. Source highlight: Deprecate `user` field in `accountRegister`

## Bug Fixes
- Fix deadlocks caused by adding variants to the checkout process.
- Fix `null` explicitly passed as the metadata input to `checkoutLinesAdd` mutation.