The Supporting Documents List in the Transaction Script file library is now showing a GUID for scripts/files submitted after an upgrade to V11+. In V10.X and for files that were migrated, the file name of the document is shown. View Link to navigate to documents works the same regardless.
Migrating from V10.X Central to V11.X/12.X User Governance
As designed to ensure a unique ID
This can't be changed, however you can hide this column from view to reduce confusion.
If you want to hide the SharePoint column from view (you must be a site collection administrator to complete these steps):
1. Go to Settings > Site Contents
2. Open the Transaction Scripts library
3. Go to Library > Modify View
4. Deselect Supporting Documents List