Editing Custom Fields in Word Round trip

Software: Codebeamer 2.1 (training environment) 

Datecode: 2.1.0.0

Hello all, 

I am doing a word roundtrip in Codebeamer, and I have made a custom template which can fetch the data from custom fields in the tracker.

Problem: In the exported roundtrip file, I am not able to edit the value of custom fields, the only editable fields in the roundtrip document are 'work item name', 'description', 'business value'. There is an editing restriction on other fields, like the custom fields.

If I forcefully edit the custom fields, the roundtrip is not working.

Let me know if this use case is possible. And if yes, please guide me on how to make the custom fields editable in the word roundtrip file.

Thank you