Incorrect method signature generated from OpenAPI definition

Question

I just took over a project about a ticketing system and have inherited the following OpenAPI specification.

openapi: '3.0.2'
info:
  title: Tickets Management
  version: '1.0'
paths:
  /tickets:
    post:
      tags:      
      - Create ticket   
      # Commented out code will generate controller method taking a NewTicket   
      # requestBody:         
      #   required: true        
      #   content: 
      #     application/json:
      #       schema:
      #         $ref: '#/components/parameters/newTicket'
      requestBody:                 
       #The following will generate a controller method taking an object
          $ref: '#/components/requestBodies/newTicket'
      operationId: CreateTicket      
      responses:
        200:
          $ref: '#/components/responses/ticketId'        
        default:
          $ref: '#/components/responses/default'   
 
components:
  parameters:
    newTicket:
      name: newTicket
      in: path
      required: true
      schema:
        $ref: '#/components/schemas/newTicket'

  requestBodies:
    newTicket:
      description: Create a new ticket
      required: true
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/newTicket'    
  schemas: 
    uuid:
      title: uuid  
      type: string
      format: uuid
      pattern: '^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$'      
      minLength: 36
      maxLength: 36
    shortText:
      title: shortText
      type: string
      pattern: ^[\s\S]+$
      example: "Any valid text"
      minLength: 1
      maxLength: 128    
    
    newTicket:
      title: Input for creating a new ticket
      description: Foobar
      type: object
      required:
        - ticketDescription        
      properties:
        creator:       
          ticketDescription: Description of the ticket
          $ref: '#/components/schemas/shortText'       
        
  responses:
    ticketId:
      description: Successfully created a new ticket.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/uuid'
   
    200:
      description: Ok
      content:
        application/json:
          schema:
            title: Ok
            type: string
            example: Ok
   
    default:
      description: Default
      content:
        application/json:
          schema:
            title: Request not found
            type: string
            example: Not found
   

When I generate C# code, .NET 6, using NSwagStudio or Unchase OpenAPI, I get the following method for creating a new ticket:

 public virtual System.Threading.Tasks.Task<System.Guid> CreateTicketAsync(object body)
 {
      return CreateTicketAsync(body, System.Threading.CancellationToken.None);
  }

As you can see, the body is of type object, which is wrong. If I instead modify the spec to point to #/components/parameters/newTicket (see commented out code in the spec), then the input parameter is of type NewTicket. Now, I prefer to point to #/components/requestBodies/.. instead of #/components/parameters/..., but how should I do that and also get the NewTicket in the method signature?

PS: Also tried to past in the spec above into editor.swagger.io and it generates

public virtual IActionResult CreateTicket([FromBody]NewTicket body)
{ 
    //Ommitted 
}

This looks better I don't want to return an IActionResult (seems to not be .NET 6.). Any suggestions?