Getting an error message when using rest api call while answering prompts for report

[kkadu]

I am getting the below error while answering the prompts for a report. I don't get an error when I do the same via postman rest-api call.
MicroStrategy Rest API Workflows > Analytics > Prompted Reports > Attribute Element Prompts

Error Message -
{'code': 'ERR001', 'message': 'Cannot add an element to the collection which is not from the source attribute.', 'ticketId': 'e749eb092650458ea4c1a36ecd1615ba'}

Code -
url_prompt_ans=f"/api/reports/{report_id}/instances/{instance_id}/prompts/answers" output = conn.put(url=conn.base_url+url_prompt_ans, json=json_data) print(output.json())

Here json_data is the json format of the prompt answer. I am not sure if this is an issue with the connection.put module for mstrio-py or something else.