Elasticsearch duplicate by date timestamp

Question

I make a query to a server in which it has duplicate data by date. I know that the base would have to be debugged, but how could I do a query like the following and return a single record per date. I clarify the dates are duplicated:

    {
        "query":{"bool":{
            "must":[
                {"range":{"@timestamp":{"lte": "2021-09-21T23:10:00.000-03:00","gte": "2021-09-21T23:10:00.000-03:00"}}},
                {"match":{"type.keyword":el_type}}
                ]
            }},
        "size":1000,
        "sort": [{"@timestamp": {"order": "asc"}}],

        "_source":{"includes":["@timestamp",el_var]}
    }