Update nested object using java client 6.5

[Mohamed]

Hello,

I want to update a nested object using java highlevel client.

My mapping looks like the following:

"reservations":{ 
               "type":"nested",
               "properties":{ 
                  "customerFullName":{ 
                     "type":"text"
                  },
                  "reservationStatus":{ 
                     "type":"text"
                  },
				  "quantity":{ 
                     "type":"double"
                  }				  
               }
            },

My java code is:

 UpdateByQueryRequest request = new UpdateByQueryRequest(ProductIndex.PRODUCT_INDEX);
		request.setQuery(QueryBuilders.matchPhraseQuery(ProductIndex.PROMOTION_REFERENCE, promotionReference));
		Map<String, Object> parameters = new HashMap<>();
		parameters.put(ProductIndex.RESERVATION_CUSTOMER_FULL_NAME, customerFullName);
		parameters.put(ProductIndex.RESERVATION_STATUS, ReservationStatus.NOT_DELIVERED);
		parameters.put(ProductIndex.RESERVATION_QUANTITY, quantity);

		request.setScript(new Script(ScriptType.INLINE, "painless", "ctx._source.reservations.add(params);", parameters));

		request.setScroll(TimeValue.timeValueMinutes(10));
		restHighLevelClient.updateByQuery(request, RequestOptions.DEFAULT);

The problem is ctx informations are added automatically to my object and I want to avoid it.
After the update I have something like this:

reservations: [
               {
                  "customerFullName" : "customer name",
                  "quantity" : 2.0,
                  "reservationStatus" : "NOT_DELIVERED",
                  "ctx" : {
                    "_routing" : null,
                    "_parent" : null,
                    "_index" : "product_index",
                    "_type" : "product",
                    "_id" : "3QzW7G8BSs1v_UxEWpxw",
                    "_version" : 2
                   }
              }
]

So how can I avoid indexing ctx informations after the update.

Thanks!