This discussion is beyond the scope of this forum. The developers have made their decision. If you have issues with this, please post directly here: Corrupt project preceded by aup3-wal file · Issue #2140 · audacity/audacity · GitHub
If you have a corrupted file, see: Corrupt or Otherwise Broken Audacity Project Recovery
If you have a backup of a project and you are getting interference from your backup service because of the file name, I would think that you can simply rename the file. Everything you need should be in the one .aup3 file.