Create index can use connector with '-', but X-Pack error

[Crab2died (螃蟹以死)]

Create index can use connector with '-', but X-Pack search error :

    {
    "error": {
    "root_cause": [
    {
    "type": "parsing_exception",
    "reason": "line 1:19: mismatched input '-' expecting {<EOF>, ',', 'FULL', 'GROUP', 'HAVING', 'INNER', 'JOIN', 'LEFT', 'LIMIT', 'NATURAL', 'ORDER', 'RIGHT', 'WHERE'}"
    }
    ],
    "type": "parsing_exception",
    "reason": "line 1:19: mismatched input '-' expecting {<EOF>, ',', 'FULL', 'GROUP', 'HAVING', 'INNER', 'JOIN', 'LEFT', 'LIMIT', 'NATURAL', 'ORDER', 'RIGHT', 'WHERE'}",
    "caused_by": {
    "type": "input_mismatch_exception",
    "reason": null
    }
    },
    "status": 400
    }