# Saleor 3.15.51 — Release & Upgrade Intelligence
- **Product:** Saleor (https://saleor.io)
- **Version:** 3.15.51
- **Released:** Jun 07, 2024
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/saleor/updates/3.15.51/

## Executive Summary (TL;DR)
Saleor 3.15.51. Source highlight: Set unit_discount_reason on line when the entire order voucher is applied (#16079) (a104b336ea)

## Improvements
- Prevent performing both transaction and payment checkout process at the same time (#15971) (#16061) (bcefe168aa)

## Bug Fixes
- Fix KeyError when event_type was not present in the event dict. (#16065) (00d844843d)
- Add proper patch for the test (d191c7c98e)