Advanced Threat Protection alerts you that a software update is available when there does not appear to be any updates available
Article ID: 164240
Advanced Threat Protection Platform
ATP versions before 2.3 may have alerted you that a new version is available when there is not.
This can be caused by running the 'update install' or 'update download' when there is no update available.
This issue is resolved in ATP 2.3. Please upgrade at your earliest convenience.