core/src/main/java/com/orientechnologies/orient/core/storage/ridbag/sbtree/OSBTreeCollectionManagerShared.java
@Override
  public UUID listenForChanges(ORidBag collection) {
    UUID ownerUUID = collection.getTemporaryId();
    if (ownerUUID != null) {
      final OBonsaiCollectionPointer pointer = collection.getPointer();

      Map<UUID, OBonsaiCollectionPointer> changedPointers = collectionPointerChanges.get();
      if (pointer != null && pointer.isValid()) {
        changedPointers.put(ownerUUID, pointer);
      }
    }

    return null;
  }
@Override
  public UUID listenForChanges(ORidBag collection) {
    UUID ownerUUID = collection.getTemporaryId();
    if (ownerUUID != null) {
      final OBonsaiCollectionPointer pointer = collection.getPointer();

      Map<UUID, OBonsaiCollectionPointer> changedPointers = collectionPointerChanges.get();
      if (pointer != null && pointer.isValid()) {
        changedPointers.put(ownerUUID, pointer);
      }
    }

    return null;
  }
Change UUID to null to prevent its serialization to disk.