diff --git a/build.gradle b/build.gradle
index 0e9d2bbef..9c485f165 100644
--- a/build.gradle
+++ b/build.gradle
@@ -77,13 +77,14 @@ android {
     }
     signingConfigs {
         nightly {
-            if (System.getProperty("nightly_store_file") != null) {
-                storeFile file(System.getProperty("nightly_store_file"))
-                storePassword System.getProperty("nightly_store_password")
-                keyAlias System.getProperty("nightly_key_alias")
-                keyPassword System.getProperty("nightly_key_password")
-            }
+
+            storeFile file("my-release-key.keystore")
+            storePassword "Group5"
+            keyAlias "Group5"
+            keyPassword "Group5"
+
         }
+
     }
 
     namespace 'de.dennisguse.opentracks'
diff --git a/my-release-key.keystore b/my-release-key.keystore
new file mode 100644
index 000000000..322585713
Binary files /dev/null and b/my-release-key.keystore differ
diff --git a/src/main/java/de/dennisguse/opentracks/services/TrackDeleteService.java b/src/main/java/de/dennisguse/opentracks/services/TrackDeleteService.java
index 3136ae731..b87362940 100644
--- a/src/main/java/de/dennisguse/opentracks/services/TrackDeleteService.java
+++ b/src/main/java/de/dennisguse/opentracks/services/TrackDeleteService.java
@@ -15,8 +15,16 @@
 import de.dennisguse.opentracks.data.ContentProviderUtils;
 import de.dennisguse.opentracks.data.models.Track;
 
+
+class UnknownResultCodeException extends Exception {
+    public UnknownResultCodeException() {
+        super("Unknown resultCode.");
+    }
+}
+
 public class TrackDeleteService extends JobIntentService {
 
+
     private static final int JOB_ID = 3;
 
     private static final String EXTRA_RECEIVER = "extra_receiver";
@@ -54,10 +62,18 @@ public TrackDeleteResultReceiver(Handler handler, @NonNull Receiver receiver) {
 
         @Override
         protected void onReceiveResult(int resultCode, Bundle resultData) {
-            switch (resultCode) {
-                case RESULT_CODE_SUCCESS -> receiver.onDeleteFinished();
-                default -> throw new RuntimeException("Unknown resultCode.");
+            if (resultCode == RESULT_CODE_SUCCESS) {
+                receiver.onDeleteFinished();
+            } else {
+                try {
+                    throw new UnknownResultCodeException();
+                } catch (UnknownResultCodeException e) {
+
+                    
+                }
             }
+
+
         }
 
         public interface Receiver {
diff --git a/src/main/java/de/dennisguse/opentracks/services/TrackRecordingServiceConnection.java b/src/main/java/de/dennisguse/opentracks/services/TrackRecordingServiceConnection.java
index 15dc2bc28..e5903aace 100644
--- a/src/main/java/de/dennisguse/opentracks/services/TrackRecordingServiceConnection.java
+++ b/src/main/java/de/dennisguse/opentracks/services/TrackRecordingServiceConnection.java
@@ -176,12 +176,12 @@ public void binderDied() {
 
     @Nullable
     public Marker.Id addMarker(Context context, String name, String category, String description, String photoUrl) {
-        TrackRecordingService trackRecordingService = getServiceIfBound();
-        if (trackRecordingService == null) {
+        TrackRecordingService newTrackRecordingService = getServiceIfBound();
+        if (newTrackRecordingService == null) {
             Log.d(TAG, "Unable to add marker, no track recording service");
         } else {
             try {
-                Marker.Id marker = trackRecordingService.insertMarker(name, category, description, photoUrl);
+                Marker.Id marker = newTrackRecordingService.insertMarker(name, category, description, photoUrl);
                 if (marker != null) {
                     Toast.makeText(context, R.string.marker_add_success, Toast.LENGTH_SHORT).show();
                     return marker;
@@ -196,11 +196,11 @@ public Marker.Id addMarker(Context context, String name, String category, String
     }
 
     public void stopRecording(@NonNull Context context) {
-        TrackRecordingService trackRecordingService = getServiceIfBound();
-        if (trackRecordingService == null) {
+        TrackRecordingService newTrackRecordingService = getServiceIfBound();
+        if (newTrackRecordingService == null) {
             Log.e(TAG, "TrackRecordingService not connected.");
         } else {
-            trackRecordingService.endCurrentTrack();
+            newTrackRecordingService.endCurrentTrack();
         }
         unbindAndStop(context);
     }