I wrote this option because it is important, for future users who may have this bug. its work. Try it. You have nothing to lose. You will have a backup (Copy and store whole save game folder (slot0001 or 0002 etc...) to another location!) …
I found a solution:
1. Enter the your game folder and find the saved games folder (F:\Steam Library\steamapps\common\Subnautica\SNAppData\SavedGames\...). Copy and store whole save game folder (slot0001 or 0002 etc...) to another location!