diff --git a/backend/static/js/app.js b/backend/static/js/app.js
index 4c58e2d..bf5c33e 100644
--- a/backend/static/js/app.js
+++ b/backend/static/js/app.js
@@ -3,7 +3,7 @@
    Router, State-Management, Navigation, Initialisierung.
    ============================================================ */
 
-const APP_VER     = '549'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
+const APP_VER     = '550'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
 const APP_VERSION = '1.1.4'; // ← semantische Version, wird bei make release gesetzt
 const IS_STAGING  = location.hostname === 'staging.banyaro.app';
 
diff --git a/backend/static/js/pages/map.js b/backend/static/js/pages/map.js
index 9ea9e0a..ded9a7d 100644
--- a/backend/static/js/pages/map.js
+++ b/backend/static/js/pages/map.js
@@ -807,6 +807,7 @@ window.Page_map = (() => {
   // Marker setzen (Placement-Mode)
   // ----------------------------------------------------------
   function _togglePlacementMode() {
+    if (!_appState?.user) { App.navigate('welcome'); return; }
     _placingMarker = !_placingMarker;
     const btn = document.getElementById('map-pin-btn');
     if (_placingMarker) {
diff --git a/backend/static/sw.js b/backend/static/sw.js
index 92fa1d6..fd9719f 100644
--- a/backend/static/sw.js
+++ b/backend/static/sw.js
@@ -3,7 +3,7 @@
    Offline-Cache + Push Notifications + Tile-Cache
    ============================================================ */
 
-const CACHE_VERSION = 'by-v572';
+const CACHE_VERSION = 'by-v573';
 const CACHE_STATIC  = `${CACHE_VERSION}-static`;
 const CACHE_TILES   = 'ban-yaro-tiles-v1';  // bleibt über SW-Updates erhalten
 const CACHE_API     = 'ban-yaro-api-v1';    // API-Response-Cache