uhh sorry since I don't know what that is, how do you exactly do that. I don't wanna do something that'll mess up my phone
go to Android/Data/com.zimon.chamoionofrealms/files and move the save folder somewhere safe (if you are on Android 11 you will need to download a 3rd party file manager if the android folder appears empty).
Delete the old version and install the new one. Then put the save folder back in the same location.