Some Prospect Ratings are appearing in query after being deleted from a constituent's record

After deleting all prospect ratings from a specific source on all constituent records, some records still show up in a query when using criteria Prospect, Rating, Source equals [the deleted rating's source].
When opening these specific constituent records, there are no ratings on their Prospect tab from this particular source.
Running this query through a Global Delete does not resolve the issue.
Contact Support and reference this article. 

Environment

 7.93.5782.2 ; 7.93.5782.4

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