Please file daycare to get a hotfix NPR-2087. It should help to purge dam assets.
OR you might have hotfix already make sure to install on other instance.
The DAM Health Checker helps to find assets which are not in sync. However this is no longer needed from 5.5 onwards since we do not have /var/dam & /content/dam.
However still retained in product & helpful if you integrated with external systems like Sharepoint,....
I didnot install any specific hotfix in my machine. How can we see whether hot fix is added or not/ IS it someackage?
I just installed only sp2.
Please check on your specific package share section page if that hotfix was already provided to you.
If you do not have it. Please file a daycare ticket requesting the hotfix including its dependencies.