diff --git a/models/pos_order.py b/models/pos_order.py
index ddffff6..71ae7c2 100644
--- a/models/pos_order.py
+++ b/models/pos_order.py
@@ -1,4 +1,5 @@
 from odoo import models, fields, api
+from collections import defaultdict
 
 #import debugpy
 import logging
@@ -19,10 +20,9 @@ class PosOrder(models.Model):
         pos_order = self.browse(pos_order_id)
 
         training_products = self.env['ows.machine.training'].search([])
-        product_map = {
-            tp.training_id.product_tmpl_id.id: tp.machine_id.id
-            for tp in training_products
-        }
+        product_map = defaultdict(list)
+        for tp in training_products:
+            product_map[tp.training_id.product_tmpl_id.id].append(tp.machine_id.id)
 
         partner = pos_order.partner_id
         if not partner:
@@ -31,15 +31,13 @@ class PosOrder(models.Model):
 
         for line in pos_order.lines:
             product_tmpl_id = line.product_id.product_tmpl_id.id
-            machine_id = product_map.get(product_tmpl_id)
-
-            _logger.info("🔍 Prüfe Produkt %s → Maschine ID: %s", line.product_id.display_name, machine_id)
-
-            if machine_id:
+            machine_ids = product_map.get(product_tmpl_id, [])
+            _logger.info("🔍 Prüfe Produkt %s → Maschinen IDs: %s", line.product_id.display_name, machine_ids)
+            for machine_id in machine_ids:
                 already_exists = self.env['ows.machine.access'].search([
                     ('partner_id', '=', partner.id),
                     ('machine_id', '=', machine_id)
-                ])
+                ], limit=1)
                 if not already_exists:
                     self.env['ows.machine.access'].create({
                         'partner_id': partner.id,