想要删除已发内容，扫码确认总是提示扫码失败，更新二维码，这是什么原因？

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想要删除已发内容，扫码确认总是提示扫码失败，更新二维码，这是什么原因？If I want to delete the sent content, the scan code confirmation always prompts that the scan code failed. Update the QR code. What is the reason?

If you want to delete the sent content, you will always be prompted to scan the code if you want to confirm the code scanning. If you want to update the QR code, what is the reason?

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