diff --git a/UPGRADING.md b/UPGRADING.md
index 9a699fe3ccf..738dc333518 100644
--- a/UPGRADING.md
+++ b/UPGRADING.md
@@ -6,6 +6,16 @@ More detailed information on key changes can be found in the [Developer update n
 
 The format of this change log follows the advice given at [Keep a CHANGELOG](https://keepachangelog.com).
 
+## 4.5.2+
+
+### core_question
+
+#### Added
+
+- Question bank Condition classes can now implement a function called "filter_invalid_values($filterconditions)" to remove anything from the filterconditions array which is invalid or should not be there.
+
+  For more information see [MDL-83784](https://tracker.moodle.org/browse/MDL-83784)
+
 ## 4.5.2
 
 ### core
diff --git a/question/UPGRADING.md b/question/UPGRADING.md
index 1636eb4416f..348d3416dcd 100644
--- a/question/UPGRADING.md
+++ b/question/UPGRADING.md
@@ -1,5 +1,13 @@
 # core_question (subsystem) Upgrade notes
 
+## 4.5.2+
+
+### Added
+
+- Question bank Condition classes can now implement a function called "filter_invalid_values($filterconditions)" to remove anything from the filterconditions array which is invalid or should not be there.
+
+  For more information see [MDL-83784](https://tracker.moodle.org/browse/MDL-83784)
+
 ## 4.5.2
 
 ### Added