Laravel parameterBag作为插入时的数组问题

我正在尝试插入海量数据，但是当我遍历请求时出现此错误：

Symfony \ Component \ Debug \ Exception \ FatalThrowableError无法使用   类型为Symfony \ Component \ HttpFoundation \ ParameterBag的对象作为数组

请求示例：

    request: Symfony\Component\HttpFoundation\ParameterBag {#52 ▼
        #parameters: array:4 [▼
        "_token" => "Z1sF2K5LHU1bsQ4l3JRaOLCTQDmJ47qakigmrfI5"
        "name" => "Routine 1"
        "sections" => array:1 [▼
            "section-1" => array:2 [▼
            "name" => "Sectdfs 1"
            "exercises" => array:2 [▼
                1 => array:1 [▼
                "name" => "Exercise 11"
                ]
                2 => array:1 [▼
                "name" => "Exercise 12"
                ]
            ]
            ]
        ]
        "submit" => "Submit"
        ]
    }

循环遍历请求并插入：

$routine = new Routine;
$routine->create(['user_id' => 1, 'name' => $request->name, 'description' => 'test description']);
foreach($request as $item){
    $section = new Section;
    $section->name = $item['name'];
    $section->description = 'test description';
    $routine->sections()->create([$section]);

    foreach($item as $item2){
        $exercise = new Exercise;
        $exercise->name = $item2['name'];
        $exercise->description = 'la la la';
        $exercise->duration = 60;
        $exercise->duration_unit = 'seconds';
        $section->exercises()->create([$exercise]);
    }
}

我添加了一些“内联”数据，因为我还没有以表格的形式处理它们，这就是为什么要添加持续时间和持续时间单位的原因。