Laravel How does form validation fail to prevent the original form data from being emptied?

I use the Validate method for form validation.

$messages = [            'art_editor.required' => '作者不能为空!',            'art_title.required' => '文章标题不能为空!',            'art_tag.required' => '文章关键字不能为空!',            'art_thumb.required' => '请上传首页图或者添加CDN地址',            'art_description.required' => '文章描述不能为空!',            'art_content.required' => '请填写文章正文!',        ];$result = $this->validate($request, [            'art_editor' => 'required',            'art_title' => 'bail|required|max:25',            'art_tag' => 'required|max:8',            'art_thumb' => 'required',            'art_description' => 'required|max:100',            'art_content' => 'required'], $messages);

However, once the form verification fails, although it will return the details of the failure, but the correct input content is also emptied together, then if I finished an article, is the article title verification failure, it is not the entire article need to rewrite? So please help! Thank you!

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