That is the firmware and hardware version for the HRC 400 the app is connected to. From your home screen if you tap on “My B-hyve” and look below the menu (just under feedback) or on the bottom of the screen it should have the version and build of the app.
Here is a link to some instructions to find the app version you are currently on if needed.
Which version on the app are you on? I was part of the group that was moved to 3.0.0 and have been manually updating to the new versions (currently 3.0.12) as they have been released. The older 2.x.x versions are also experiencing issues since they are focused on 3.x.x updates and bug fixes.