Vault UI shows all versions as deleted if delete_version_after is configured

[recrsn]

In a kv2 storage backend, Vault UI shows all versions to be deleted if delete_version_after is configured.

To Reproduce
Steps to reproduce the behavior:

1. Configure delete_version_after. Run vault kv metadata put -delete-version-after=300s secret/test
2. Add some new versions of the secret. Run vault kv put secret/test message="data1"
3. Open the secret in the UI

Expected behavior
Latest version of the secret should be visible

Actual behavior
Version is shown to be deleted

Environment:

• Vault Server Version (retrieve with vault status): Vault v1.2.3
• Vault CLI Version (retrieve with vault version): Vault v1.2.3
• Server Operating System/Architecture: MacOS 10.15 Catalina

The same error is also present in Vault compiled from master

[con-f-use]

There seems to be a regression. I'm on Vault v1.15.4, I set delete_version_after=1s in the UI, secret doesn't get deleted. Or am I missing some extra prerequisites or configuration I have to make?

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