Found a way to get back into my saved world following another person post which worked for me there were few side affects like the time turned back to day 1 [you can change it in console] and every item being crafted and smelted in forge etc got a time lag so just cancel and start crafting smelting again.
Navigate to: C:\Users<your username>\AppData\Roaming\7DaysToDie\Saves<map name><save name> (the error message should give you the exact path as well).
Copy the <save name> folder to your desktop or somewhere else. (you're making a backup just in case)
Create a new game on that same map and remember the save name, I'll refer to this as <new save name>, then quit the game.
Navigate to: C:\Users<your username>\AppData\Roaming\7DaysToDie\Saves<map name><new save name> and copy both the main.ttw and main.ttw.bak to the C:\Users<your username>\AppData\Roaming\7DaysToDie\Saves<map name><save name> folder. You will be told that "The destination has 2 files with the same names", click on "Replace the files in the destination" button.
Run 7DTD and try to continue your game.
