diff --git a/data/ddl/index/TBL_CONTRAT_UK.php b/data/ddl/index/TBL_CONTRAT_UK.php
index 80d49ca9cff92a122fe40a60c5cefa1720ab5c21..1edd4f3f65686a1ed5bdc16169ca1255661d8521 100644
--- a/data/ddl/index/TBL_CONTRAT_UK.php
+++ b/data/ddl/index/TBL_CONTRAT_UK.php
@@ -9,6 +9,7 @@ return [
     'columns' => [
         'CONTRAT_ID',
         'VOLUME_HORAIRE_ID',
+        'CONTRAT_PARENT_ID',
         'VOLUME_HORAIRE_REF_ID',
         'VOLUME_HORAIRE_MISSION_ID',
         'DATE_FIN',