Hi Nikita,

I don't think so.

If the field is readonly at dictionary level I can still update it from scripts background so it should be possible via transform map as well.

If there is some data policy applied to that field and made that as readonly then from script also you can't update/write to it.

Mark Correct if this solves your issue and also hit Like and Helpful if you find my response worthy based on the impact.

Thanks

Ankur