I'm pretty new when it comes to Android Studio, but have been watching a lot of tutorials where I can register users, etc. But I now want a user to be able to leave a review that is stored in Firebase. I have created a RecyclerView so I can view the reviews left by all users, but I am having an issue where when I leave a review, it deletes the current review in Firebase, so there is always only one review. The following is my code for registering a review to Firebase:

```
public void registerReview(){
        String email = emailR.getText().toString().trim();
        String message = messageR.getText().toString().trim();

        Review review = new Review(email, message);
        FirebaseDatabase.getInstance().getReference("Review")
                .child(FirebaseAuth.getInstance().getCurrentUser().getUid())
                .setValue(review).addOnCompleteListener(new OnCompleteListener<Void>() {
            @Override
            public void onComplete(@NonNull Task<Void> task) {
                if(task.isSuccessful()){
                    Toast.makeText(RegisterReview.this, "Thanks for your feedback!", Toast.LENGTH_LONG).show();
                    startActivity(new Intent(RegisterReview.this, MainMenu.class));
                }
                else{
                    Toast.makeText(RegisterReview.this, "Failed to Register", Toast.LENGTH_LONG).show();
                }
            }
        });

```

How would I change this so every review is stored without deleting the previous? Is this occurring due to .setValue?