diff --git a/src/Bundle/ChillCalendarBundle/Entity/Calendar.php b/src/Bundle/ChillCalendarBundle/Entity/Calendar.php
index ba5ef4a6d..3f36dd908 100644
--- a/src/Bundle/ChillCalendarBundle/Entity/Calendar.php
+++ b/src/Bundle/ChillCalendarBundle/Entity/Calendar.php
@@ -63,7 +63,7 @@ class Calendar
      * @ORM\JoinTable(name="chill_calendar.calendar_to_persons")
      * @Groups({"read"})
      */
-    private ?Collection $persons = null;
+    private Collection $persons;
 
     /**
      *