Hello
您好，您可以查看下是否是历史存档，历史存档还原后即可编辑。https://manual.marginnote.cn/guide/#%E4%BB%80%E4%B9%88%E6%98%AF%E5%8E%86%E5%8F%B2%E5%AD%98%E6%A1%A3%E5%8F%8A%E5%85%B6%E6%93%8D%E4%BD%9C%E4%B8%8E%E7%9B%B8%E5%85%B3%E8%AF%B4%E6%98%8E-3-5-2
Kind Regards,
MarginNote-Echo
Support Team