Steam Deck (Linux) fix for corrupted save file message on startup

Naviagte to

'/home/deck/.steam/steam/steamapps/compatdata/847370/pfx/drive_c/users/steamuser/AppData/Local/Sunset/Saves/YOURSAVEFOLDERNUMBER/'

and edit and save the file

'steam_autocloud.vdf'

as an empty file (delete its contents and save)

Turn off Steam Cloud Saves for Sunset Overdrive in the Deck's game settings before starting the game and you should be good to go.

It should be noted that I followed these steps before playing the game for the first time so I never had a cloud save on Steam for Sunset Overdrive. The message never appeared for me.