Save and load array!

I wanted to store and load, score of each level(nearly 10). Everthing works fine..i stored and load in Json. But, if we play the level again..the score keeps on adding. I need to delete the specific level score and subtract it from main score and add the new one. Please help me.

No one can help you unless you post either your project file or images of your code. Without that nobody has any idea what you have or haven't done.