Redundant snapshots are not deleted immediately:

ARTIFACTORY: How does the “Max Unique Snapshots” parameter work in Artifactory?

AuthorFullName__c
Fadi Rouhana
articleNumber
000005403
ft:sourceType
Salesforce
FirstPublishedDate
2022-09-12T09:58:55Z
lastModifiedDate
2022-09-12
VersionNumber
3

Every time you deploy a snapshot, Artifactory will check the value Max Unique Snapshots for the repository, and if exceeded will mark any excess old snapshots for deletion. Then, every 5 minutes, Artifactory runs a background process that deletes those oldest snapshots that have been marked. For example, if you set Max Unique Snapshots to 5 and deploy a sixth and seventh snapshot to the repository, then the next time the background process runs, it will delete the two oldest snapshots.