Editing a shared Looker studio report starts with:

To edit a shared Looker Studio report, you must first create a copy of it. This is because shared reports are often view-only to protect the original creator's work and data integrity. By making a copy, you create your own editable version without affecting the original report or other users who have access to it. Changing the name, making the shared file your own, or changing any field directly are not options for editing a shared, view-only report; these actions would require edit permissions on the original file, which is typically not granted for shared reports.