升级到TYPO3 8 LTS后TYPO3的文件上传问题

Question

我有研讨会扩展，它有两个字段可以浏览文件。检查以下TCA配置：

字段图像：

'image' => [
    'exclude' => 1,
    'label' => 'LLL:EXT:seminars/Resources/Private/Language/locallang_db.xlf:
         tx_seminars_seminars.image',
    'config' => [
        'type' => 'group',
        'internal_type' => 'file',
        'allowed' => 'gif,png,jpeg,jpg',
        'max_size' => 4096,
        'uploadfolder' => 'uploads/tx_seminars',
        'size' => 1,
        'minitems' => 0,
        'maxitems' => 1,
    ],
],

字段附加文件：

'attached_files' => [
    'exclude' => 1,
    'label' => 'LLL:EXT:seminars/Resources/Private/Language/locallang_db.xlf:tx_seminars_seminars.attached_files',
    'config' => [
        'type' => 'group',
        'internal_type' => 'file',
        'allowed' => 'jpg,jpeg,png,bmp,gif,tiff,tif,' . 'txt,pdf,ps,' .
            'svg,' . 'doc,docx,sxw,odt,' . 'xls,xlsx,sxc,ods,' .
            'ppt,pptx,sxi,odp,' . 'html,htm,css,js,xml,xsd,' .
            'zip,rar,gz,tgz,tar,bz2,tbz,tbz2',
        'max_size' => 4096,
        'uploadfolder' => 'uploads/tx_seminars/',
        'size' => 5,
        'maxitems' => 200,
        'minitems' => 0,
        'autoSizeMax' => 40,
    ],
],

从TYPO3 6.x升级到8 LTS后，由于文件上载字段，记录未保存。如果我删除其中一个字段，则说明该字段工作正常。 有人可以帮我吗？

感谢前进！