critical error when using nullable enum

[illunix]

What are you generating using Kiota, clients or plugins?

API Client/SDK

In what context or format are you using Kiota?

Windows executable

Client library/SDK language

TypeScript

Describe the bug

So I get critical error when trying to build with this enum in spec

"Currency": {
        "enum": [
          "USD",
          "GBP",
          "EUR",
          null
        ]
      }

 "currency": {
            "oneOf": [
              {
                "type": "null"
              },
              {
                "$ref": "#/components/schemas/Currency"
              }
            ]
          }

Expected behavior

generate client without any problem

How to reproduce

use nullable enum somewhere in code

Open API description file

No response

Kiota Version

1.29.0

Latest Kiota version known to work for scenario above?(Not required)

No response

Known Workarounds

No response

Configuration

No response

Debug output

Click to expand log

```

</details>


### Other information

_No response_

[sdil]

Is it similar to my error:

crit: Kiota.Builder.KiotaBuilder[0]
      error generating the client: Value cannot be null or empty: referenceId (Parameter 'referenceId')