iOS app 'The application could not be verified' only on one device

Question

I have two iphone devices( 4s and 5 ) connected to my computer and i am trying to install an application in both the devices. It installs pretty well in iphone 5 but it give

Answer 1

I also encountered the same issue. Deleting the app didn't work, but when I tried deleting another app which was the current one's 'parent'(I copied the whole project from the previous app, modified some urls and images, then I clicked 'Run' and saw the unhappy 'could not be verified' dialog). Seems the issue is related to provisioning and code signing and/or some configurations of the project. Very tricky.