diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4fb1ec6e..c048a945 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,11 +1,15 @@
 # Release Notes for Blitz
 
-## 4.11.2 - Unreleased
+## 4.11.2 - 2024-02-19
 
 ### Changed
 
 - Asset queries containing filenames are no longer tracked.
 
+### Fixed
+
+- Fixed a bug in the diagnostics utility that only affected Postgres ([#621](https://github.com/putyourlightson/craft-blitz/issues/621)).
+
 ## 4.11.1 - 2024-02-12
 
 ### Fixed
diff --git a/src/helpers/DiagnosticsHelper.php b/src/helpers/DiagnosticsHelper.php
index c5da4e3e..e6a76c83 100644
--- a/src/helpers/DiagnosticsHelper.php
+++ b/src/helpers/DiagnosticsHelper.php
@@ -172,7 +172,7 @@ public static function getElementsQuery(int $siteId, string $elementType, ?int $
             ->innerJoin(['elements' => Table::ELEMENTS], '[[elements.id]] = [[elementcaches.elementId]]')
             ->innerJoin(['content' => Table::CONTENT], '[[content.elementId]] = [[elementcaches.elementId]]')
             ->where($condition)
-            ->groupBy(['elementcaches.elementId', 'title'])
+            ->groupBy(['elementcaches.elementId', 'elementexpirydates.expiryDate', 'title'])
             ->asArray();
     }
 
@@ -192,7 +192,7 @@ public static function getElementQueriesQuery(int $siteId, string $elementType,
             ->innerJoinWith('cache')
             ->innerJoinWith('elementQuery')
             ->where($condition)
-            ->groupBy(ElementQueryRecord::tableName() . '.id')
+            ->groupBy([ElementQueryRecord::tableName() . '.id', 'params'])
             ->asArray();
     }