diff --git a/src/Bundle/ChillActivityBundle/Service/DocGenerator/ListActivitiesByAccompanyingPeriodContext.php b/src/Bundle/ChillActivityBundle/Service/DocGenerator/ListActivitiesByAccompanyingPeriodContext.php
index 9298983c2..a2fa996a6 100644
--- a/src/Bundle/ChillActivityBundle/Service/DocGenerator/ListActivitiesByAccompanyingPeriodContext.php
+++ b/src/Bundle/ChillActivityBundle/Service/DocGenerator/ListActivitiesByAccompanyingPeriodContext.php
@@ -122,13 +122,13 @@ class ListActivitiesByAccompanyingPeriodContext implements
                 function ($activity) use ($user) {
                     $u = $activity['user'];
 
-                    if (null !== $u && $u['username'] === $user->getUsername()) {
+                    if (null !== $u && $u['username'] === $user->getUserIdentifier()) {
                         return true;
                     }
 
                     $activityUsernames = array_map(static fn ($user) => $user['username'], $activity['users'] ?? []);
 
-                    return \in_array($user->getUsername(), $activityUsernames, true);
+                    return \in_array($user->getUserIdentifier(), $activityUsernames, true);
                 }
             )
         );
@@ -143,9 +143,9 @@ class ListActivitiesByAccompanyingPeriodContext implements
             array_filter(
                 $works,
                 function ($work) use ($user) {
-                    $workUsernames = array_map(static fn ($user) => $user['username'], $work['referrers'] ?? []);
+                    $workUsernames = array_map(static fn (User $user) => $user['username'], $work['referrers'] ?? []);
 
-                    return \in_array($user->getUsername(), $workUsernames, true);
+                    return \in_array($user->getUserIdentifier(), $workUsernames, true);
                 }
             )
         );