Swift true machine debugging, boot failure error failed to get the task for process resolution

Problem Description:

Today, the mobile phone to the computer, intends to pass the Xcode for real machine debugging. When the compilation is running, start the error directly. Mobile phone screen, Xcode this side displays the error information as follows:
Could not launch "sailing song"

Process launch failed:failed to get the task for process 9794

Using the emulator to run is no problem.

Reason Analysis:
This is a certificate issue. True machine debugging project and targets certificates must be a development certificate that I forgot to change back after using the Publish certificate release program.

Problem solving:
In the "Build Settings"-> "Code signing" in the distribution to Developer can be changed.