How not to overwrite object present in json.

Hi, I created this function. It works correctly however when I change the variable "nemico" it doesn't create me a new object in json but overwrites the one already present, for example nemico1 is replaced with nemico2, instead of creating nemico1 and nemico2.

Instead with livello it doesn't happen, how come?

Thanks to all.

Hi, I solved it by adding a condition if the "livello" key is exist, in which case it doesn't create it so it doesn't overwrite the data already there.