Retrofit2 one processing is done 2 times?

Question

Android

Good evening, I just can not understand one thing.
Connect Retforit2 with an additional okHttp client, connect to a button that, when pressed, should add an entry to the database, when I click once it hits the database 2 times, even to the "php" file from which it is processed and added connected the log, it also completed it 2 times . What could be the problem here, help me, yes, for 3 hours I've been scratching my head at the code below.
Here it calls the file 2 times, I don't know why.

07-30 10:35:27.301 21415-24513/ri.project.test D/OkHttp: --> GET http://localhost/testing http/1.1
07-30 10:35:27.301 21415-24513/ru.project.test D/OkHttp: --> END GET
07-30 10:35:27.682 21415-24513/ru.project.test D/OkHttp: <-- 200 OK http://localhost/testing?code=1 (381ms)
07-30 10:35:27.683 21415-24513/ru.project.test D/OkHttp: Server: nginx
07-30 10:35:27.683 21415-24513/ru.project.test D/OkHttp: Date: Sun, 30 Jul 2017 10:35:28 GMT
07-30 10:35:27.683 21415-24513/ru.project.test D/OkHttp: Content-Type: application/json
07-30 10:35:27.683 21415-24513/ru.project.test D/OkHttp: Transfer-Encoding: chunked
07-30 10:35:27.683 21415-24513/ru.project.test D/OkHttp: Connection: keep-alive
07-30 10:35:27.683 21415-24513/ru.project.test D/OkHttp: Vary: Accept-Encoding

public class Api {
    private static Retrofit RETROFIT;
    public static Retrofit getRetrofit() {
        if (RETROFIT == null) {
            OkHttpClient okHttpClient = initHttpClient();
            RETROFIT = new Retrofit.Builder()
                    .baseUrl("http://172.16.0.22:8099")
                    .client(okHttpClient)
                    .addConverterFactory(GsonConverterFactory.create())
                    .build();
        }
        return RETROFIT;
    }

    private static OkHttpClient initHttpClient() {
        return new OkHttpClient.Builder()
                .addInterceptor(new LogInterceptor(BuildConfig.DEBUG))
.addInterceptor(new Interceptor()
                {
                    @Override
                    public Response intercept(Interceptor.Chain chain) throws IOException
                    {
                        Request original = chain.request();

                        HttpUrl originalHttpUrl = original.url();
                        HttpUrl url = originalHttpUrl.newBuilder()
                                .addQueryParameter("code", "1")
                                .build();

                        Request.Builder requestBuilder = original.newBuilder()
                                .url(url)
                                .method(original.method(), original.body());
                        Request request = requestBuilder.build();

                        return chain.proceed(request);
                    }
                })
                .build();
    }

    public static UserApi getUserApi() {
        return getRetrofit().create(UserApi.class);
    }
}

Call<Void> call = UserApi.getUserApi().postCreateContact("phone","7****");
                call.enqueue(new Callback<Void>()
                {
                    @Override
                    public void onResponse(@NonNull Call<Void> call, @NonNull Response<Void> response)
                    {
//
          }
        });

Guys please help me what is the problem.