Fetch records with Group by with Completion Suggester

{
    "XYZ": {
        "mappings": {
            "properties": {
                "customerInfo": {
                    "properties": {
                        "emailList": {
                            "type": "text",
                            "fields": {
                                "keyword": {
                                    "type": "keyword"
                                }
                            }
                        },
                        "id": {
                            "type": "text",
                            "fields": {
                                "completion": {
                                    "type": "completion",
                                    "analyzer": "standard",
                                    "preserve_separators": true,
                                    "preserve_position_increments": true,
                                    "max_input_length": 50,
                                    "contexts": [
                                        {
                                            "name": "mailboxIdStr",
                                            "type": "CATEGORY",
                                            "path": "mailboxIdStr"
                                        }
                                    ]
                                },
                                "keyword": {
                                    "type": "keyword"
                                }
                            }
                        },
                        "name": {
                            "type": "text",
                            "fields": {
                                "completion": {
                                    "type": "completion",
                                    "analyzer": "simple",
                                    "preserve_separators": true,
                                    "preserve_position_increments": true,
                                    "max_input_length": 50,
                                    "contexts": [
                                        {
                                            "name": "mailboxIdStr",
                                            "type": "CATEGORY",
                                            "path": "mailboxIdStr"
                                        }
                                    ]
                                },
                                "keyword": {
                                    "type": "keyword"
                                }
                            },
                            "fielddata": true
                        }
                    }
                }
            }
        }
    }
}


As per above mapping I'm making request something like this.
{
    "suggest": {
        "subject_suggest": {
            "prefix": "t",
            "completion": {
                "field": "customerInfo.name.completion",
                "size": 3,
                "contexts": {
                    "mailboxIdStr": [
                        770,
                        854,
                        901,
                        902
                    ]
                }
            }
        }
    }
}


It gives me response  something like this.

{
    "suggest": {
        "subject_suggest": [
            {
                "text": "John",
                "offset": 0,
                "length": 1,
                "options": [
                    {
                        "text": "The G",
                        "_index": "conversations",
                        "_type": "_doc",
                        "_id": "CxTc6W4Bk0d_pHk3pEIX",
                        "_score": 1.0,
                        "_source": {
                            "customerInfo": {
                                "id": "1",
                                "name": "John",
                                "emailList": "test@gmail.com"
                            }
                        }
                    },
                    {
                        "text": "The G",
                        "_index": "conversations",
                        "_type": "_doc",
                        "_id": "DhTc6W4Bk0d_pHk3pEIX",
                        "_score": 1.0,
                        "_source": {
                            "customerInfo": {
                                "id": "1",
                                "name": "John",
                                "emailList": "test@gmail.com"
                            }
                        }
                    },
                    {
                        "text": "The G",
                        "_index": "conversations",
                        "_type": "_doc",
                        "_id": "FRTc6W4Bk0d_pHk3pEIX",
                        "_score": 1.0,
                        "_source": {
                            "customerInfo": {
                                "id": "2",
                                "name": "John",
                                "emailList": "testing@google.com"
                            }
                        }
                    }
                ]
            }
        ]
    }
}

In response i got dublicate records.
It gives me 2 dublicate records --> id: 1 and name:John.
In actual result name can be same but it should have unique id.
My expected output is as per below.


{
    "suggest": {
        "subject_suggest": [
            {
                "text": "John",
                "offset": 0,
                "length": 1,
                "options": [
                    {
                        "text": "The G",
                        "_index": "testconversations",
                        "_type": "_doc",
                        "_id": "DhTc6W4Bk0d_pHk3pEIX",
                        "_score": 1.0,
                        "_source": {
                            "customerInfo": {
                                "id": "1",
                                "name": "John",
                                "emailList": "test@gmail.com"
                            }
                        }
                    },
                    {
                        "text": "The G",
                        "_index": "testconversations",
                        "_type": "_doc",
                        "_id": "FRTc6W4Bk0d_pHk3pEIX",
                        "_score": 1.0,
                        "_source": {
                            "customerInfo": {
                                "id": "2",
                                "name": "John",
                                "emailList": "testing@gmail.com"
                            }
                        }
                    }
                ]
            }
        ]
    }
}

So i'm stuck here how to get this type of result.