diff --git a/data-computer/v1/base-line.ini b/data-computer/v1/base-line.ini
index a7814a5..0916da8 100644
--- a/data-computer/v1/base-line.ini
+++ b/data-computer/v1/base-line.ini
@@ -45,8 +45,7 @@
 file = buffer.cfg
 
 # Step 2.1 (spécifique): Lancer un calcul sur tous les items reçus
-[fork/exchange]
-value = self().omit('uri')
+[fork/transit]
 
 # Step 2.2 (générique): Enregister le résulat et signaler que le traitment est fini
 [fork/delegate]
diff --git a/data-computer/v1/charger.cfg b/data-computer/v1/charger.cfg
index 7bff09a..228af1d 100644
--- a/data-computer/v1/charger.cfg
+++ b/data-computer/v1/charger.cfg
@@ -23,5 +23,8 @@
 path = identifier
 value = get(env('pid')).replace('uid:/', '')
 
+[singleton/exchange]
+value = self().omit([env('pid')])
+
 [metrics]
 bucket = charger