diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/dto/AtomicEntityOperationDetails.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/dto/AtomicEntityOperationDetails.java
index d973e68668a64afdc1080586b8abae64f8f4c05b..e3c700df62740f9fb92b3e17821ef3e99698c2bc 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/dto/AtomicEntityOperationDetails.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/dto/AtomicEntityOperationDetails.java
@@ -45,11 +45,10 @@ public class AtomicEntityOperationDetails implements Serializable
     // The unique identifier for this registration
     private final TechId registrationIdOrNull;
 
-    // The userid on whose behalf the operations are done.
+    // The userid on whose behalf the operations are done, or null if not done on behalf of another
+    // user
     private final String userIdOrNull;
 
-    // This is always an empty list, since it is not currently possible to update experiments from
-    // the DSS
     private final List<ExperimentUpdatesDTO> experimentUpdates;
 
     private final List<NewSpace> spaceRegistrations;