Updating the Party Name in resource file

Summary:

Hello,

We have a situation where several users were initially set up with extra spaces between their first and last name. It looks like the issue has been corrected in Manage Users, but in the resources file, the PartyName still shows 3 spaces between the first and last name. We tried to do a patch using postman but we get a message 403 Forbidden when we try to fix the field that way (note: we are able to patch other fields in other files so our authorization credentials are fine). Is there a way to update this field in the resource