Saves not rating of pictures after changing them

Hey everyone, 

Today I was rating some of my pictures again and now, as I wanted to keep working with them, the rating, which was there was still that of before I changed it this morning. Does anyone have a tip on how I can restore the ratings? I worked on that for several hours and it is really disappointing if I have to double-work for this. 

Thank you for your help 🙂