In a typical Apple fashion, the Cupertino-based iPhone and iPad manufacturer has stopped signing both iOS & iPadOS 14.5 after the newer iOS & iPadOS 14.5.1 firmware has been available to the general public for one week.
Apple’s decision to stop signing iOS & iPadOS 14.5 means that those who’ve upgraded to iOS or iPadOS 14.5.1 can no longer easily downgrade to the previous firmware. Likewise, those using even older versions of iOS or iPadOS will be compelled to upgrade to version 14.5.1 instead of being able to manually install 14.5 via Finder or iTunes.