Following the deployment of T429417: Add Link should not make a recommendation if one has already been accepted or declined (Limit an article to only one Add a Link suggestion), we should run GrowthExperiments:revalidateLinkRecommendations.php on all Wikimedia wikis. This would actually drop the recommendations that task aims to exclude, completing that effort.
This script is expected to take a significant time, requiring an engineer to babysit it every now and then. See T437158 for a prior example.