Group Permissions in a Workspace vs. a Report

Hey all,

I have a group in SS that needs to be able to edit a report but shouldn't have edit abilities for the entire Workspace. I have set them as viewers to the Workspace and Editors for the reports. However, they seem to not be able to edit the fields in the reports. Is there any way to accomplish this or do they need to be editors to the Workspace as well? Thanks in advance for any help!