I have wonder why this query has occurred Parse Error?
And i wonder what should I do to operate as create Item?
[ My GraphQL Query ]
mutation {
    create_item (board_id: ${boardId}, group_id: ${groupId}, item_name: ${itemName}, column_values: "{\\"___5\\":\\"\\uC708(\\uC8FC)\\"}"
    )
    { id
        board {
            id
            name
        }              
        group {
            id
            title
        }
    }
}
[ Error Code ]
{
    "errors": [
        {
            "message": "Parse error on \\"(\\" (LPAREN) at [2, 149]",
            "locations": [
                {
                    "line": 2,
                    "column": 149
                }
            ]
        }
    ],
    "account_id": 8736257
}


