Symptoms:

XRAY: Issue With Indexing Old Builds

AuthorFullName__c
Yuvarajan Johnpaul
articleNumber
000005345
ft:sourceType
Salesforce
FirstPublishedDate
2022-07-26T09:20:08Z
lastModifiedDate
2022-07-26
VersionNumber
3
All the new build scans and artifact scans are working as expected. However, the old build scans are not working.

RabbitMQ holds 2 different types of Queues as stated here (while INDEXING).
https://jfrog.com/knowledge-base/jfrog-xray-rabbitmq-queues/
Amongst the 2 queues, especially indexExistingContent takes care of the indexing of existing artifacts triggered by reindexing a repository.