In Creation portal collection editor, Save Question set as Draft is not Working in Observation with rubrics

[ramkumar-pacewisdom]

Prerequisites

I have searched for existing issues that already report this problem, without success.

Current Behaviour

I'm trying to save Question set as Draft of Observation with rubrics in dock dev but it's throwing 500 internal server error.

Expected Behaviour

When user try to save Question set as Draft it should need to save Question set without failure.

Steps to Reproduce

1. Created project from Sourcing admin using TPD framework.
2. Submitted nomination from contributor.
3. Approve Nomination from sourcing admin.
4. Click "Create/upload content" on project page it will open Question set page with domain and criteria.
5. Add Questions to the Question set.
6. Then we click on "save as Draft" button instead of saving the Question set it's failing from following API.
7. Failing API => https://dock.sunbirded.org/api/questionset/v1/hierarchy/update
8. The Above API returning 500 error as 
          `{
          "id": "api.questionset.hierarchy.update",
          "ver": "3.0",
          "ts": "2023-11-16T03:37:13ZZ",
          "params": {
              "resmsgid": "bad4d882-12ab-48bd-9646-fe7bebc3d96f",
              "msgid": null,
              "err": "ERR_SYSTEM_EXCEPTION",
              "status": "failed",
              "errmsg": "Something went wrong in server while processing the request"
          },
          "responseCode": "SERVER_ERROR",
          "result": {} }

API Endpoints used

   1. https://dock.sunbirded.org/api/questionset/v1/hierarchy/update

Additional Information

Tested on Google Chrome: Version 114.0.5735.198 (Official Build) (arm64)

Note : I'm running the dock dev Environment in Local setup.
can anybody help on this.
@pallakartheekreddy @vaivk369

cc: @kiranharidas187