Hello,

You can change it. From the storage where you have your image, Name it by your name and make it unique so that you don't get confused while uploading.

Check for the size and resolution and format required to be uploaded. If you upload new image, old image will get replaced automatically. Not to worry about that.

Make sure you don't make any mistake. if at any point of process, any mistake or false information is found then your application will get rejected then and there.

Hope it helps!