Problem Working with DynamoDBChatStorage: valid min length: 3

[arturcordeiromie]

Hello, I have the following problem: the DynamoDB ChatStorage documentation asks us to use the PK and SK attributes, however, when trying to create a table with the following attributes, I receive this botocore error:

botocore.exceptions.ParamValidationError: Parameter validation failed: Invalid length for parameter LocalSecondaryIndexes[0].IndexName, value: 2, valid min length: 3

And if I change de SK Attribute name, I get this other error:

DynamoDB table:

class grominho_multiAgentSystem(NoSQLBase):
    PK = Attribute(str, primary=True)
    SK = Attribute(str, index=True)

    ttl = Attribute(int, index=True)

Orchestrator:

    table_name = 'dev_grominho_multiagentsystemhistory'
    region = 'sa-east-1'
    TTL_DURATION = 30
    dynamodb_storage = DynamoDbChatStorage(table_name, region, ttl_key='ttl', ttl_duration=TTL_DURATION)

    new_orchestrator = MultiAgentOrchestrator(
        storage=dynamodb_storage,
        classifier=agent_classifier,
        options=OrchestratorConfig(
            LOG_AGENT_CHAT=True,
            LOG_CLASSIFIER_CHAT=True,
            LOG_CLASSIFIER_RAW_OUTPUT=True,
            LOG_CLASSIFIER_OUTPUT=True,
            LOG_EXECUTION_TIMES=True,
            MAX_RETRIES=3,
            USE_DEFAULT_AGENT_IF_NONE_IDENTIFIED=True,
            MAX_MESSAGE_PAIRS_PER_AGENT=50,
            NO_SELECTED_AGENT_MESSAGE=(
                "Desculpe, eu não consegui entender o que você disse. "
                "Poderia reformular, por favor?"
            )
        )
    )

error:

ERROR:multi_agent_orchestrator.utils.logger:Error querying conversations from DynamoDB:An error occurred (ValidationException) when calling the Query operation: Query condition missed key schema element

What I need to do?