I created a simple database, when the user enters new data a database is created to calculate the number of posts entered by the user and it works well in the add-on, the problem is that during the deletion process the database is not updated by decreasing the value, i.e. if it was 1 and when deleting, it is supposed to become 0, for those who do not, the value remains 1

This code is in case of addition

private void Poste(){
        String userId = FirebaseAuth.getInstance().getCurrentUser().getUid();
        DatabaseReference countRef = FirebaseDatabase.getInstance()
                .getReference("dbStatis")
                .child("Clinics")
                .child(userId);
        countRef.runTransaction(new Transaction.Handler() {
            @Override
            public Transaction.Result doTransaction(MutableData mutableData) {
                Integer currentValue = mutableData.getValue(Integer.class);
                if (currentValue == null) {
                    // Handle the case where the value is initially null
                    currentValue = 0;
                }
                // Decrement the value
                int newValue = Math.max(0, currentValue + 1);
                mutableData.setValue(newValue);
                return Transaction.success(mutableData);
            }
            @Override
            public void onComplete(DatabaseError error, boolean committed,
                                   DataSnapshot currentData) {
                if (error != null) {
                    Log.w(TAG, "Transaction failed:", error.toException());
                } else {
                    Log.d(TAG, "Transaction committed.");
                }
            }
        });
    }

i call code in onCreate Poste(); If the addition is successful

on remove data

private void DeleteData(){
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage("Are you sure you want to delete the recording           permanently?");
        builder.setPositiveButton("نعم", (dialog, which) -> {
            final DatabaseReference reference = FirebaseDatabase.getInstance().getReference("dbClinics");
            FirebaseStorage storage = FirebaseStorage.getInstance();
            StorageReference storageReference = storage.getReferenceFromUrl(imageUrl);
            storageReference.delete().addOnSuccessListener(new OnSuccessListener<Void>() {
                @Override
                public void onSuccess(Void unused) {
                    reference.child(key).removeValue();
                    PosteDes();
                    Toast.makeText(DetailClinic.this, "Permanently deleted", Toast.LENGTH_SHORT).show();
                    startActivity(new Intent(getApplicationContext(), HomeClinics.class));
                    AnimationOut();
                    finish();
                }
            });
        });
        builder.setNegativeButton("no", (dialog, which) -> {
            dialog.dismiss();

            });
        AlertDialog dialog = builder.create();
        dialog.show();

    }
    private void PosteDes(){
        String userId = FirebaseAuth.getInstance().getCurrentUser().getUid();
        DatabaseReference countRef = FirebaseDatabase.getInstance()
                .getReference("dbStatis")
                .child("Clinics")
                .child(userId);

        countRef.runTransaction(new Transaction.Handler() {
            @Override
            public Transaction.Result doTransaction(MutableData mutableData) {
                Integer currentValue = mutableData.getValue(Integer.class);
                if (currentValue == null) {
                    // Handle the case where the value is initially null
                    currentValue = 0;
                }

                // Decrement the value
                int newValue = Math.max(0, currentValue - 1);
                mutableData.setValue(newValue);

                return Transaction.success(mutableData);
            }

            @Override
            public void onComplete(DatabaseError error, boolean committed,
                                   DataSnapshot currentData) {
                if (error != null) {
                    Log.w(TAG, "Transaction failed:", error.toException());
                } else {
                    Log.d(TAG, "Transaction committed.");
                }
            }
        });
    }

i call code in onCreate PosteDes(); If the Remove is successful