Update CHANGELOG

stellar · May 1, 2020 · 90c2af2 · 90c2af2
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diff --git a/services/horizon/CHANGELOG.md b/services/horizon/CHANGELOG.md
@@ -3,6 +3,10 @@
 All notable changes to this project will be documented in this
 file. This project adheres to [Semantic Versioning](http://semver.org/).
 
+## v1.2.1
+
+* Remove `id` columns from `history_operation_participants` and `history_transaction_participants` to prevent possible integer overflow [#2532](https://github.com/stellar/go/pull/2532).
+
 ## v1.2.0
 
 ### Scheduled Breaking Changes