If you just need that OOB BPF, try exporting in a solution from another environment and import into your affected organization. That should solve the problem.
There is no soft delete, once saved and published - it overwrites, that being said - take a backup in a solution (zip file) and keep it aside, else do “save as” before doing any customization. Even better, keep a lower environment for POC, R&D without disturbing your Prod replica Dev environment.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…