What steps did you take and what happened:

extension of #7292

We want to invalidate backupRepositories on server startup for all pre-existing BSLs.

Red Hat QE have found that after installing velero and running a successful backup with kopia
Scaling down velero deployment to 0 and deleting/recreating BSL with different prefix then scaling velero back to 1 replica.
Creating another kopia backup result in failed kopia backup

status:
  completionTimestamp: "2024-01-08T11:19:25Z"
  message: 'error to initialize data path: error to boost backup repository connection
    ts-dpa-1-ocp-todolist-mariadb-kopia: error to connect backup repo: error to connect
    repo with storage: error to connect to repository: repository not initialized
    in the provided storage'
  phase: Failed
  progress: {}
  startTimestamp: "2024-01-08T11:19:23Z"

and further, the BackupRepository were pointing to old resticIdentifier.

What did you expect to happen:

The following information will help us better understand what's going on:

If you are using velero v1.7.0+:
Please use velero debug --backup <backupname> --restore <restorename> to generate the support bundle, and attach to this issue, more options please refer to velero debug --help

If you are using earlier versions:
Please provide the output of the following commands (Pasting long output into a GitHub gist or other pastebin is fine.)

• kubectl logs deployment/velero -n velero
• velero backup describe <backupname> or kubectl get backup/<backupname> -n velero -o yaml
• velero backup logs <backupname>
• velero restore describe <restorename> or kubectl get restore/<restorename> -n velero -o yaml
• velero restore logs <restorename>

Anything else you would like to add:

Environment:

• Velero version (use velero version):
• Velero features (use velero client config get features):
• Kubernetes version (use kubectl version):
• Kubernetes installer & version:
• Cloud provider or hardware configuration:
• OS (e.g. from /etc/os-release):

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