diff --git a/user_guide_src/source/changelogs/v4.5.0.rst b/user_guide_src/source/changelogs/v4.5.0.rst
index b257cf31143f..70db5d635773 100644
--- a/user_guide_src/source/changelogs/v4.5.0.rst
+++ b/user_guide_src/source/changelogs/v4.5.0.rst
@@ -200,6 +200,9 @@ Model
 Libraries
 =========
 
+- **Validation:** Added the new rule ``field_exists`` that checks the filed
+  exists in the data to be validated.
+
 Helpers and Functions
 =====================