diff --git a/dashboard.py b/dashboard.py
index 705c3dc..d00b5d2 100644
--- a/dashboard.py
+++ b/dashboard.py
@@ -24,6 +24,11 @@ def speichere_fuellwoerter(woerter):
     with open(FUELLWOERTER_DATEI, "w", encoding="utf-8") as f:
         json.dump(woerter, f, ensure_ascii=False, indent=2)
 
+def reset_session_daten():
+    with open(DATEN_DATEI, "w", encoding="utf-8") as f:
+        json.dump({"status": "wartend", "sessions": [], "fehler": None}, f, ensure_ascii=False, indent=2)
+    print("--- Dashboard gestartet – Session-Daten zurückgesetzt ---")
+
 @app.route("/")
 def index():
     daten = lade_daten()
@@ -65,4 +70,5 @@ def fuellwort_entfernen(wort):
     return redirect(url_for("index"))
 
 if __name__ == "__main__":
+    reset_session_daten()
     app.run(host="0.0.0.0", port=5000, debug=True, threaded=True)