For reasons of administration or maintenance of your AD infrastructure, you delete one or more objects One of these objects would generate in Alsid for AD one or more deviance, not remedied. After ADObject deletion these deviance always appear, with no possibility of remedying them since the AD object concerned is deleted.
And Alsid service account hasn't granted rights for Deleted Objects The Ghost Object Syndrome:
If an account for which a deviance remained has been deleted and the Alsid service account does not have specific read rights on the Deleted Objects container, then Alsid keeps the last trace of the object with its deviance (cannot "crawl" "an updated state).Remediation:
Here are instructions: How to manage Alsid service account