Me and My Girlfriend were going to go on our stardew save and we lost progress. We were originally in day 26 of winter and we went back to fall and lost tons of progress. I don't know how to fix this.
Open the folder with the save files. Copy both files to a secure location (as a backup). Then delete the one without the "old" and rename the one with "old" so it has the same name the other one had.
Open the folder with the save files. Copy both files to a secure location (as a backup). Then delete the one without the "old" and rename the one with "old" so it has the same name the other one had.