diff --git a/app/src/main/java/io/timelimit/android/ui/model/setup/SetupLocalModePermissions.kt b/app/src/main/java/io/timelimit/android/ui/model/setup/SetupLocalModePermissions.kt
index 400de7b..fde83c0 100644
--- a/app/src/main/java/io/timelimit/android/ui/model/setup/SetupLocalModePermissions.kt
+++ b/app/src/main/java/io/timelimit/android/ui/model/setup/SetupLocalModePermissions.kt
@@ -1,5 +1,5 @@
 /*
- * TimeLimit Copyright <C> 2019 - 2023 Jonas Lochmann
+ * TimeLimit Copyright <C> 2019 - 2024 Jonas Lochmann
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -22,6 +22,7 @@ import io.timelimit.android.coroutines.executeAndWait
 import io.timelimit.android.crypto.Curve25519
 import io.timelimit.android.data.Database
 import io.timelimit.android.integration.platform.PlatformIntegration
+import io.timelimit.android.integration.platform.ProtectionLevel
 import io.timelimit.android.logic.AppLogic
 import io.timelimit.android.ui.manage.device.manage.permission.PermissionScreenContent
 import io.timelimit.android.ui.model.ActivityCommand
@@ -89,7 +90,11 @@ object SetupLocalModePermissions {
                     confirm = { launch {
                         updateState { it.copy(currentDialog = null) }
 
-                        setupParentKeyMode(logic.database)
+                        if (logic.platformIntegration.getCurrentProtectionLevel() == ProtectionLevel.DeviceOwner) {
+                            snackbarHostState.showSnackbar(logic.context.getString(R.string.setup_select_mode_parent_key_error_owner))
+                        } else {
+                            setupParentKeyMode(logic.database)
+                        }
                     } },
                     cancel = { updateState { it.copy(currentDialog = null) } }
                 ) else null,
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 199ccd5..e6adf82 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -1557,6 +1557,7 @@
         TimeLimit schränkt dieses Gerät nicht ein. Es wird als zusätzlicher Schlüssel bei einem anderen Gerät im lokalen Mdous verwendet,
         um dort die Einstellungen von TimeLimit zu entsperren. Am anderen Gerät kann auch jederzeit ein Passwort verwendet werden.
     </string>
+    <string name="setup_select_mode_parent_key_error_owner">TimeLimit ist Gerätebesitzer und kann nicht als Schlüssel eingerichtet werden.</string>
 
     <string name="setup_select_mode_uninstall_title">TimeLimit entfernen</string>
     <string name="setup_select_mode_uninstall_text">
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index edeb4d8..3d7e478 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1597,6 +1597,7 @@
         unlock the settings of TimeLimit at an other device which uses the local mode (there is always
         a password to unlock the settings).
     </string>
+    <string name="setup_select_mode_parent_key_error_owner">TimeLimit is device owner and can not be configured as a key.</string>
 
     <string name="setup_select_mode_uninstall_title">uninstall TimeLimit</string>
     <string name="setup_select_mode_uninstall_text">