If a migration fails, the system disk of the target server is a temporary disk with the disk name starting with sms. As a result, the original system disk of the target server cannot be attached back.
The temporary system disk was not detached. You need to manually detach the temporary disk.
The following uses Linux as an example to describe how to handle this problem.

After about a minute, the temporary disk on the target server will be detached and deleted, and the original system disk will be re-attached.
