[Question]: Ref handling in discriminator mappings doesn't allow different discriminator keys to map to the same entity?

[IgorMaj]

Question

Hello, I'm using your library as part of the following component (openapi-generator), and I've already posted an issue here. In the snippet below, you can see what I'm trying to do. I'm trying to map different discriminator property values to the same entity. However, it results in an error.

Affected Version

2.0.30 (at least), seems to be introduced here.

I'm using 2.0.30

Context

      responses:
        '200':
          description: "List of all the objects."
          content:
            application/json:
              schema:
                type: array
                items:
                  oneOf:
                    - $ref: '#/components/schemas/TypeA'
                    - $ref: '#/components/schemas/TypeB'
                  discriminator:
                    propertyName: discriminatorProperty
                    mapping:
                      ONE: '#/components/schemas/TypeA'
                      TWO: '#/components/schemas/TypeB'
                      THREE: '#/components/schemas/TypeB'
                      FOUR: '#/components/schemas/TypeB'
                      FIVE: '#/components/schemas/TypeB'

Additional Details

This is the error:
java.lang.IllegalStateException: Duplicate key #/components/schemas/TypeB (attempted merging values TWO and THREE)

Checklist

• [ y] I have searched the existing issues and documentation before asking.
• [ y] I have provided enough information for others to understand my question.