Implemented workaround. We create our own ids instead of using CommCare case_id.

app/src/main/java/com/aluxoft/earrecognition/activities/SelectFollowupActivity.java

@@ -14,6 +14,8 @@ import com.aluxoft.earrecognition.common.EarIdList;
 import com.aluxoft.earrecognition.common.NameDistance;
 import com.google.gson.Gson;
 
+import java.util.UUID;
+
 /**
  * Shows top 10 matches, allows to register if not match is satisfactory.
  * TODO: Populate list
@@ -59,7 +61,9 @@ public class SelectFollowupActivity extends Activity {
         registerButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                SelectFollowupActivity.this.setResult(Activity.RESULT_OK, new Intent());
+                Intent intent = new Intent();
+                intent.putExtra("case_id", UUID.randomUUID().toString());
+                SelectFollowupActivity.this.setResult(Activity.RESULT_OK, intent);
                 finish();
             }
         });

app/src/main/java/com/aluxoft/earrecognition/intents/IntentTransferingFeatures.java

@@ -25,6 +25,7 @@ import org.apache.commons.io.FileUtils;
 
 import java.io.File;
 import java.io.IOException;
+import java.util.UUID;
 
 /**
  * Callout to transfer features to CommCare
@@ -61,6 +62,11 @@ public class IntentTransferingFeatures extends Activity {
                     try {
                         _showTransferringMessage();
                         Intent returningIntent = new Intent(getIntent());
+
+                        Bundle responses = new Bundle();
+                        responses.putString("ear_id", UUID.randomUUID().toString());
+                        returningIntent.putExtra("odk_intent_bundle", responses);
+
                         returningIntent.putExtra(
                                 "odk_intent_data",
                                 FileUtils.readFileToString(
@@ -147,6 +153,11 @@ public class IntentTransferingFeatures extends Activity {
             String list = data.getStringExtra("list");
             EarIdList earIdList = new Gson().fromJson(list, EarIdList.class);
             Intent returningIntent = new Intent(getIntent());
+
+            Bundle responses = new Bundle();
+            responses.putString("ear_id", UUID.randomUUID().toString());
+            returningIntent.putExtra("odk_intent_bundle", responses);
+
             returningIntent.putExtra(
                     "odk_intent_data",
                     earIdList.getCurrentFeature().serializeFeatures()

app/src/main/java/com/aluxoft/earrecognition/loader/EarDataLoaderCommcare.java

@@ -52,7 +52,7 @@ public class EarDataLoaderCommcare extends EarDataLoader {
                     gender = caseCursor.getString(caseCursor.getColumnIndex("value"));
                 } else */if (datumId.equals("features")) {
                     features = caseCursor.getString(caseCursor.getColumnIndex("value"));
-                } else if (datumId.equals("case_id_internal")) { // ToDo: Remplazarlo con una mejor forma
+                } else if (datumId.equals("ear_id")) { // ToDo: Remplazarlo con una mejor forma
                     caseId = caseCursor.getString(caseCursor.getColumnIndex("value"));
                 }
             }