Phrase_query for multiple should and must

Elastic Stack Elasticsearch
1

I've indexed my documents as follows:

doc = {
    "_index": index_name,
    "_source": {
        "field": "bm25",
        "passage": passage,
        "passage_id": pid,
        "level1": level1,
        "level2": level2,
        "level3": level3,
        "level4": level4
    },
    "_op_type": "index"
}

With the ES index, I'm trying to retrieve relevant documents using a passage as a query (linking a passage to relevant passages). However, on top of the input query passage being closely matched with the passage field from the indexed documents, I'd like to consider level1~4 fields as well.

Given the query_passage, query_level1, query_level2, query_level3, and query_level4, I want to retrieve documents that share similar passages but also share the same level1~4.

I've wrote phrase_query as below, but it's giving me opensearchpy.exceptions.RequestError: RequestError(400, 'parsing_exception', 'unknown query [query]') error message.

phrase_query = {
    "query": {
        "bool": {
            "should": [
                {"multi_match":
                     {"query": query_passage,
                      "fields": ["passage"]
                      }
                 }
            ],
            "must": [
                {
                    "match": {
                        "level1": {
                            "query": query_level1
                        }
                    }
                },
                {
                    "match": {
                        "level2": {
                            "query": query_level2
                        }
                    }
                },
                {
                    "match": {
                        "level3": {
                            "query": query_level3
                        }
                    }
                },
                {
                    "match": {
                        "level4": {
                            "query": query_level4
                        }
                    }
                }
            ]
        }
    }
}

I want query levels to exactly match levels and auery_passage to be the ingredient where BM25 score is calculated w.r.t the passage field. Any help would be appreciated!

2

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