Hello @Ramanjaneyulu Chintha Thank you for reaching out to us on Microsoft Q&A platform. Happy to assist!
I understand that you want to delete duplicate backup jobs from vault that is enabled with user assigned managed identity and customer managed key for encryption.
I'm sorry to say, you cannot selectively delete recovery points. Doc reference: FAQ - Backing up Azure VMs - Azure Backup | Microsoft Learn
Hope this answers your question. Let us know if you have any questions!