Error for oneOf validation on swagger without using oneOf

      - in: query
        name: e
        schema:
          type: string
        description: E coordonate

swagger: "2.0"

info:
  title: Swagger Template
  description: A Template API
  version: "0.1"

paths:
  /analyse_coordonates:
    get:
      operationId: app.core.analyse_coords
      summary: Endpoint to receive coordonates and return bivouac zone
      parameters:
      - in: query
        name: e
        type: string
        description: E coordonate
      - in: query
        name: n
        type: string
        description: N coordonate
      produces:
      - text/plain
      responses:
        200:
          description: OK
          schema:
            type: array
            items:
              type: integer