Strange enum generation while using anyOf in schema

[danyadanch]

What are the steps to reproduce this issue?

1. Use this schema:

{
  "openapi": "3.1.0",
  "info": {
    "title": "TEST API",
    "version": "0.0.1",
    "description": ""
  },
  "paths": {
    "/api/sheets/transactions": {
      "put": {
        "operationId": "updateTransaction",
        "summary": "Update",
        "parameters": [],
        "responses": {
          "200": {
            "description": "OK"
          }
        },
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/UpdateTransactionSchema"
              }
            }
          },
          "required": true
        }
      }
    }
  },
  "components": {
    "schemas": {
      "UpdateTransactionSchema": {
        "discriminator": {
          "mapping": {
            "EX": "#/components/schemas/UpdateTransactionSchemaBase",
            "IN": "#/components/schemas/UpdateTransactionSchemaBase",
            "TRANSFER": "#/components/schemas/UpdateTransactionTransferSchemaBase"
          },
          "propertyName": "type"
        },
        "oneOf": [
          {
            "$ref": "#/components/schemas/UpdateTransactionSchemaBase"
          },
          {
            "$ref": "#/components/schemas/UpdateTransactionTransferSchemaBase"
          }
        ],
        "title": "UpdateTransactionSchema"
      },
      "UpdateTransactionSchemaBase": {
        "additionalProperties": false,
        "properties": {
          "type": {
            "enum": [
              "IN",
              "EX"
            ],
            "title": "Type",
            "type": "string"
          }
        },
        "required": [
          "type"
        ],
        "title": "UpdateTransactionSchemaBase",
        "type": "object"
      },
      "UpdateTransactionTransferSchemaBase": {
        "additionalProperties": false,
        "properties": {
          "type": {
            "const": "TRANSFER",
            "title": "Type"
          }
        },
        "required": [
          "type"
        ],
        "title": "UpdateTransactionTransferSchemaBase",
        "type": "object"
      }
    }
  },
  "servers": []
}

2. generate Zod schema

What happens?

/**
 * Generated by orval v6.29.1 🍺
 * Do not edit manually.
 * TEST API
 * OpenAPI spec version: 0.0.1
 */
import {
  z as zod
} from 'zod'


/**
 * @summary Update
 */
export const updateTransactionBody = zod.object({
  "type": zod.enum(['IN', 'EX', 'EX', 'IN'])
}).or(zod.object({
  "type": zod.enum(['TRANSFER'])
}))

What were you expecting to happen?

/**
 * Generated by orval v6.29.1 🍺
 * Do not edit manually.
 * TEST API
 * OpenAPI spec version: 0.0.1
 */
import {
  z as zod
} from 'zod'


/**
 * @summary Update
 */
export const updateTransactionBody = zod.object({
  "type": zod.enum(['EX', 'IN'])
}).or(zod.object({
  "type": zod.enum(['TRANSFER'])
}))

[danyadanch]

@melloware to be honest i need some help with this because my pr is just proof of concept that fixes my bug

[melloware]

i added @anymaniax as a reviewer and @soartec-lab