Azure OpenAI ServiceのOn Your DataのAPIで複数のAzure AI Searchの検索インデックスの指定ができるのか？

from openai import AzureOpenAI

endpoint = "<aoaiのエンドポイント>"
api_key = "<aoaiのapiキー>"
deployment = "<aoaiのデプロイメント名>"
search_endpoint = "<ai searchのエンドポイント>"
search_index_1 = "ai-search-index-1"
search_index_2 = "ai-search-index-1"
search_api_key = "<ai searchのapiキー>"

client = AzureOpenAI(
    azure_endpoint=endpoint,
    api_key=api_key,
    api_version="2024-02-01",
)

completion = client.chat.completions.create(
    model=deployment,
    messages=[
        {
            "role": "user",
            "content": "AI活用の重要な点を教えてください。",
        },
    ],
    extra_body={
        "data_sources": [
            {
                "type": "azure_search",
                "parameters": {
                    "endpoint": search_endpoint,
                    "index_name": search_index_1,
                    "authentication": {
                        "type": "api_key",
                        "key": search_api_key
                    }
                }
            },
            {
                "type": "azure_search",
                "parameters": {
                    "endpoint": search_endpoint,
                    "index_name": search_index_2,
                    "authentication": {
                        "type": "api_key",
                        "key": search_api_key
                    }
                }
            }
        ]
    }
)

print(completion.model_dump_json(indent=2))

BadRequestError: Error code: 400 - {'error': {'requestid': '******', 'code': 400, 'message': 'Validation error at #/data_sources: List should have at most 1 item after validation, not 2'}}