akka.actor.InvalidActorNameException: actor name [mavudp] is not unique!

[geeksville]

akka.actor.InvalidActorNameException: actor name [mavudp] is not unique!
at akka.actor.dungeon.ChildrenContainer$NormalChildrenContainer.reserve(ChildrenContainer.scala:130)
at akka.actor.dungeon.Children$class.reserveChild(Children.scala:77)
at akka.actor.ActorCell.reserveChild(ActorCell.scala:369)
at akka.actor.dungeon.Children$class.makeChild(Children.scala:202)
at akka.actor.dungeon.Children$class.attachChild(Children.scala:42)
at akka.actor.ActorCell.attachChild(ActorCell.scala:369)
at akka.actor.ActorSystemImpl.actorOf(ActorSystem.scala:552)
at com.geeksville.andropilot.service.AndropilotService.startUDP(AndropilotService.scala:355)
at com.geeksville.andropilot.service.AndropilotService$$anonfun$4.apply$mcV$sp(AndropilotService.scala:276)
at com.ridemission.scandroid.UsesPreferences$$anon$1.onSharedPreferenceChanged(UsesPreferences.scala:38)
at android.app.SharedPreferencesImpl$EditorImpl.notifyListeners(SharedPreferencesImpl.java:455)
at android.app.SharedPreferencesImpl$EditorImpl.apply(SharedPreferencesImpl.java:365)
at android.preference.Preference.tryCommit(Preference.java:1349)
at android.preference.Preference.persistString(Preference.java:1382)
at android.preference.EditTextPreference.setText(EditTextPreference.java:88)
at android.preference.EditTextPreference.onDialogClosed(EditTextPreference.java:147)
at android.preference.DialogPreference.onDismiss(DialogPreference.java:390)
at android.app.Dialog$ListenersHandler.handleMessage(Dialog.java:1233)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4898)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
at dalvik.system.NativeStart.main(Native Method)
akka.actor.InvalidActorNameException: actor name [mavudp] is not unique!
at akka.actor.dungeon.ChildrenContainer$NormalChildrenContainer.reserve(ChildrenContainer.scala:130)
at akka.actor.dungeon.Children$class.reserveChild(Children.scala:77)
at akka.actor.ActorCell.reserveChild(ActorCell.scala:369)
at akka.actor.dungeon.Children$class.makeChild(Children.scala:202)
at akka.actor.dungeon.Children$class.attachChild(Children.scala:42)
at akka.actor.ActorCell.attachChild(ActorCell.scala:369)
at akka.actor.ActorSystemImpl.actorOf(ActorSystem.scala:552)
at com.geeksville.andropilot.service.AndropilotService.startUDP(AndropilotService.scala:355)
at com.geeksville.andropilot.service.AndropilotService$$anonfun$4.apply$mcV$sp(AndropilotService.scala:276)
at com.ridemission.scandroid.UsesPreferences$$anon$1.onSharedPreferenceChanged(UsesPreferences.scala:38)
at android.app.SharedPreferencesImpl$EditorImpl.notifyListeners(SharedPreferencesImpl.java:455)
at android.app.SharedPreferencesImpl$EditorImpl.apply(SharedPreferencesImpl.java:365)
at android.preference.Preference.tryCommit(Preference.java:1349)
at android.preference.Preference.persistString(Preference.java:1382)
at android.preference.EditTextPreference.setText(EditTextPreference.java:88)
at android.preference.EditTextPreference.onDialogClosed(EditTextPreference.java:147)
at android.preference.DialogPreference.onDismiss(DialogPreference.java:390)
at android.app.Dialog$ListenersHandler.handleMessage(Dialog.java:1233)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4898)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
at dalvik.system.NativeStart.main(Native Method)