I can understand your frustration. I have had this happen to me on rare occasions but when it happens it is really annoying and I usually never bother to re-create the scene.

These days I do a save as on a regular basis so that I can step back to a previous version if it all goes pear shaped. When I have finished with the scene I delete all but the last and last but one copies.

 

 

I use Poser 13 on Windows 11 - For Scene set up I use a Geekcom A5 -  Ryzen 9 5900HX, with 64 gig ram and 3 TB  storage, mini PC with final rendering done on normal sized desktop using an AMD Ryzen Threadipper 1950X CPU, Corsair Hydro H100i CPU cooler, 3XS EVGA GTX 1080i SC with 11g Ram, 4 X 16gig Corsair DDR4 Ram and a Corsair RM 100 PSU .   The desktop is in a remote location with rendering done via Queue Manager which gives me a clearer desktop and quieter computer room.