We are getting error while creating a Request from Proposal. I am able to create the child request directly but not through Proposal. For me it seems some field mapping error from parent to child. But, I believe PPM would only check for matching token to copy the data from parent to child.
The child request is simple request with no field groups but for some fields it is using KNTA_ tokens which is not allowed in PPM for custom fields. I removed the KNTA_ from tokens and then it successfully created the child request.