The reasons why the history of this platform cannot be deleted and the solutions are as follows:

1. Network failure: There is a problem with the network, and the history of Miley Miley cannot be deleted. Solution: Restart or refresh the network.

2. Mobile phone system cache: The mobile phone operating system will also cache the history of the beep, resulting in the phenomenon that it cannot be deleted. Solution: Open the phone settings, find the system cache settings, and clear the relevant data.