There are duplicates of the Inventory and Application Metering Plugins Upgrade Policies in the SMP Console and they have the same name but different GUIDs.
Also, these plugins will not update.
ITMS 8.7
Corrupted Installation
Try the following:
NOTE: The above should fix the corruption that occurred during an installation and this should eliminate the duplicate policies, allowing the plugin upgrades to occur.
Inventory and Application Metering Plug-in installers stuck at retrying download (KB 267858)