Just run a full scan on the mahcines which you see in the table. There could be reasons that it might be on a Thumbdrive or a CD Drive.
If the location is pointed to any of these, just insert a blank drive and scan it. Once sep sends the log to sepm, this will automatically change...
If stil it doesnt work, there is an alternate which would need manually clearing it. Let me know, I can share the steps.