Temporary files can be renamed. It's a wrong behavior.
Try to provide a temporary file id to admin/content/files/rename/{file} URL.
admin/content/files/rename/{file}
Add a check if a file is permanent.
none.
Fixed
1.0
Code
Issue #3349430: add a check if file is permanent
Fixed in dev version.
Automatically closed - issue fixed for 2 weeks with no activity.