I am seeing error - repo doesn't exist, while trying to raise pr via bitbucket rest endpoint

Sravya Nalla

I am trying to raise pr from (example data) master branch of 

https://{bitbucket_base_url.com}/users/sravya/repos/sample_repo/browse

to 

master branch of https://{bitbucket_base_url.com}/projects/my_project_key/repos/sample_repo/browse.

Endpoint i am using : 

https://{bitbucket_base_url.com}/rest/api/1.0/projects/my_project_key/repos/sample_repo/pull-requests

Payload : 

payload = {

    "title": "Hi",

    "description": "Hello",

    "state": "OPEN",

    "open": True,

    "closed": False,

    "fromRef": {

        "id": "refs/heads/master",

        'repository': {

            'slug': "sample_repo",

            'name': None,

            'project':{

                'key':'sravya'

            }

        }

    },

    "toRef": {

        "id": "refs/heads/master",

        'repository': {

            'slug': "sample_repo",

            'name': None,

            'project':{

                'key':'my_project_key'

            }

        }

    },

    "locked": False,

    # "reviewers": [

    #     {

    #         "user": {

    #             "name": "sravya"    

    #         }

    #     },

    # ]

}

i am getting  404 - {"errors":[{"context":null,"message":"Repository sravya/sample_repo does not exist.","exceptionName":null}. can someone help??