diff --git a/backend/app/DETACHED_INSTANCE_FIX_DOCUMENTATION.md b/backend/app/DETACHED_INSTANCE_FIX_DOCUMENTATION.md
new file mode 100644
index 000000000..0519ecba6
--- /dev/null
+++ b/backend/app/DETACHED_INSTANCE_FIX_DOCUMENTATION.md
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/backend/app/blueprints/guest.py b/backend/app/blueprints/guest.py
index cbefce7f5..5222f36c0 100644
--- a/backend/app/blueprints/guest.py
+++ b/backend/app/blueprints/guest.py
@@ -36,7 +36,9 @@ def approver_required(f):
 def guest_request_form():
     """Formular für Gastanfragen anzeigen."""
     with get_cached_session() as db_session:
-        printers = db_session.query(Printer).filter_by(active=True)
+        printers = db_session.query(Printer).filter_by(active=True).all()
+        # Drucker-Liste von der Session trennen für Template-Verwendung
+        db_session.expunge_all()
     return render_template('guest_request.html', printers=printers)
 
 @guest_blueprint.route('/requests/overview', methods=['GET'])
@@ -44,8 +46,10 @@ def guest_requests_overview():
     """Öffentliche Übersicht aller Druckanträge mit zensierten persönlichen Daten."""
     try:
         with get_cached_session() as db_session:
-            # Alle Gastanfragen laden, sortiert nach Erstellungsdatum (neueste zuerst)
-            guest_requests = db_session.query(GuestRequest).order_by(desc(GuestRequest.created_at)).all()
+            # Alle Gastanfragen mit eager loading des printer-Relationships laden
+            guest_requests = db_session.query(GuestRequest).options(
+                joinedload(GuestRequest.printer)
+            ).order_by(desc(GuestRequest.created_at)).all()
             
             # Daten für Gäste aufbereiten (persönliche Daten zensieren)
             public_requests = []
@@ -77,7 +81,7 @@ def guest_requests_overview():
                     else:
                         censored_reason = req.reason[:10] + "***" if len(req.reason) > 10 else "***"
                 
-                # Drucker-Info laden
+                # Drucker-Info laden (jetzt durch eager loading verfügbar)
                 printer_name = "Unbekannt"
                 if req.printer:
                     printer_name = req.printer.name
diff --git a/backend/app/database/myp.db-wal b/backend/app/database/myp.db-wal
index f0d2f4a94..40f73abb4 100644
Binary files a/backend/app/database/myp.db-wal and b/backend/app/database/myp.db-wal differ
diff --git a/backend/app/migrate_admin_features.py b/backend/app/migrate_admin_features.py
new file mode 100644
index 000000000..0519ecba6
--- /dev/null
+++ b/backend/app/migrate_admin_features.py
@@ -0,0 +1 @@
+ 
\ No newline at end of file
diff --git a/backend/app/models.py b/backend/app/models.py
index bcabec3fc..997aaec6e 100644
--- a/backend/app/models.py
+++ b/backend/app/models.py
@@ -764,8 +764,15 @@ class GuestRequest(Base):
     author_ip = Column(String(50))
     otp_used_at = Column(DateTime, nullable=True)  # Zeitpunkt der OTP-Verwendung
     
+    # Neue Felder für Admin-Verwaltung
+    processed_by = Column(Integer, ForeignKey("users.id"), nullable=True)  # Admin der die Anfrage bearbeitet hat
+    processed_at = Column(DateTime, nullable=True)  # Zeitpunkt der Bearbeitung
+    approval_notes = Column(Text, nullable=True)  # Notizen bei Genehmigung
+    rejection_reason = Column(Text, nullable=True)  # Grund bei Ablehnung
+    
     printer = relationship("Printer")
     job = relationship("Job")
+    processed_by_user = relationship("User", foreign_keys=[processed_by])  # Admin der bearbeitet hat
     
     def to_dict(self) -> dict:
         """
@@ -781,8 +788,13 @@ class GuestRequest(Base):
             "status": self.status,
             "printer_id": self.printer_id,
             "job_id": self.job_id,
+            "processed_by": self.processed_by,
+            "processed_at": self.processed_at.isoformat() if self.processed_at else None,
+            "approval_notes": self.approval_notes,
+            "rejection_reason": self.rejection_reason,
             "printer": self.printer.to_dict() if self.printer else None,
-            "job": self.job.to_dict() if self.job else None
+            "job": self.job.to_dict() if self.job else None,
+            "processed_by_user": self.processed_by_user.to_dict() if self.processed_by_user else None
         }
     
     def generate_otp(self) -> str: