diff --git a/src/UnicaenSynchro/Entity/Db/IsSynchronisableTrait.php b/src/UnicaenSynchro/Entity/Db/IsSynchronisableTrait.php
index a40ea3e4f8b314941d5e26f5603699b77b1bef56..31b437a884c04d1f5d67bddc70857edaac0f5442 100644
--- a/src/UnicaenSynchro/Entity/Db/IsSynchronisableTrait.php
+++ b/src/UnicaenSynchro/Entity/Db/IsSynchronisableTrait.php
@@ -10,8 +10,8 @@ trait IsSynchronisableTrait {
     private ?Datetime $updatedOn;
     private ?Datetime $deletedOn;
 
-    private ?string $sourceId;
-    private ?string $idOrig;
+    private ?string $sourceId = null;
+    private ?string $idOrig = null;
 
     public function getInsertedOn(): ?DateTime
     {