Scanned software overload

Scanned software overload

We have been running SDP for over 3 years and are trying to "clean up" the assets. At this point there are over 6000 items in scanned software. Would it be best to delete all of them and start over? Is there another way to know what is "real" and "in use" software versus something that was scanned 3 years ago on a workstation that has been disposed of.

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