Error:Xcode is automatically signed for development but a conflicting code signing identity.

Error message:

 XX is automatically signed for development but a conflicting code signing identity

Reason:

The problem is in Code Signing Identity. This is a new problem that showed up on the latest release of Xcode. Go to Code Signing Identity, then add other and type in "iPhone Developer" as shown in the error message and save then this will display.

Fix:

In xcode select the Project Target-> Build Settings.

And then Uncheck "Automatically manage signing", then check it again and reselect the Team. Xcode then fix whatever was causing the issue on its own.