It’s a mis-numbering from Avast. 10.2.2505 and 10.3.2505 are the same version. When they pulled 10.3.2507, the accidently renumbered 10.2.2505, the previous version, to 10.3.2505. Since there is really no 10.3.2505, the clients are stuck thinking there is. If you roll back the version (uninstall - reinstall) you’ll get 10.2.2505.