个人公众号可以迁移到企业公众号吗？

{"errcode":45015,"errmsg":"response out of time limit or subscription is canceled rid: 635f47df-1dafe632-413b3e72"} 接口地址：https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token= 用户在最近几分钟内在公众号内发送过消息，为啥会提示这个？

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https://api.weixin.qq.com/cgi-bin/media/get?access_token=ACCESS_TOKEN&media_id=MEDIA_ID 获取图片都是{"errcode":40007,"errmsg":"invalid media_id hint: [U.6.Ia0770p445] rid: 623819ba-54bf4a95-4765e7fd"}