diff --git a/.changes/unreleased/Fixed-20231120-174603.yaml b/.changes/unreleased/Fixed-20231120-174603.yaml
new file mode 100644
index 000000000..0d8b80652
--- /dev/null
+++ b/.changes/unreleased/Fixed-20231120-174603.yaml
@@ -0,0 +1,5 @@
+kind: Fixed
+body: 'Export: fix loading of "Group activity by type"'
+time: 2023-11-20T17:46:03.999758401+01:00
+custom:
+  Issue: "211"
diff --git a/src/Bundle/ChillActivityBundle/Export/Aggregator/ActivityTypeAggregator.php b/src/Bundle/ChillActivityBundle/Export/Aggregator/ActivityTypeAggregator.php
index fa658635b..2c7891dd6 100644
--- a/src/Bundle/ChillActivityBundle/Export/Aggregator/ActivityTypeAggregator.php
+++ b/src/Bundle/ChillActivityBundle/Export/Aggregator/ActivityTypeAggregator.php
@@ -56,20 +56,15 @@ class ActivityTypeAggregator implements AggregatorInterface
 
     public function getLabels($key, array $values, $data): \Closure
     {
-        // for performance reason, we load data from db only once
-        $this->activityTypeRepository->findBy(['id' => $values]);
-
-        return function ($value): string {
+        return function (null|int|string $value): string {
             if ('_header' === $value) {
                 return 'Activity type';
             }
 
-            if (null === $value || '' === $value) {
+            if (null === $value || '' === $value || null === $t = $this->activityTypeRepository->find($value)) {
                 return '';
             }
 
-            $t = $this->activityTypeRepository->find($value);
-
             return $this->translatableStringHelper->localize($t->getName());
         };
     }