curl --request POST \
  --url https://api.helicone.ai/v1/prompt/version/{promptVersionId}/subversion \
  --header 'Content-Type: application/json' \
  --header 'authorization: <api-key>' \
  --data '{
  "newHeliconeTemplate": "<any>",
  "isMajorVersion": true,
  "metadata": {},
  "experimentId": "<string>",
  "bumpForMajorPromptVersionId": "<string>"
}'

{
  "data": {
    "id": "<string>",
    "minor_version": 123,
    "major_version": 123,
    "prompt_v2": "<string>",
    "model": "<string>",
    "helicone_template": "<string>",
    "created_at": "<string>",
    "metadata": {},
    "parent_prompt_version": "<string>",
    "experiment_id": "<string>",
    "updated_at": "<string>"
  }
}