diff --git a/netbox_agent/config.py b/netbox_agent/config.py
index cf88f69..44d1019 100644
--- a/netbox_agent/config.py
+++ b/netbox_agent/config.py
@@ -28,6 +28,8 @@ def get_config():
     p.add_argument('--update-inventory', action='store_true', help='Update inventory')
     p.add_argument('--update-location', action='store_true', help='Update location')
     p.add_argument('--update-psu', action='store_true', help='Update PSU')
+    p.add_argument('--purge-old-devices', action='store_true',
+                   help='Purge existing (old ?) devices having same name but different serial')
 
     p.add_argument('--log_level', default='debug')
     p.add_argument('--netbox.url', help='Netbox URL')
diff --git a/netbox_agent/server.py b/netbox_agent/server.py
index 9cedf62..e052a44 100644
--- a/netbox_agent/server.py
+++ b/netbox_agent/server.py
@@ -228,6 +228,13 @@ class ServerBase():
         )
         return new_blade
 
+    def _netbox_deduplicate_server(self):
+        serial = self.get_service_tag()
+        hostname = self.get_hostname()
+        server = nb.dcim.devices.get(name=hostname)
+        if server and server.serial != serial:
+            server.delete()
+
     def _netbox_create_server(self, datacenter, tenant, rack):
         device_role = get_device_role(config.device.server_role)
         device_type = get_device_type(self.get_product_name())
@@ -336,6 +343,9 @@ class ServerBase():
         rack = self.get_netbox_rack()
         tenant = self.get_netbox_tenant()
 
+        if config.purge_old_devices:
+            self._netbox_deduplicate_server()
+
         if self.is_blade():
             chassis = nb.dcim.devices.get(
                 serial=self.get_chassis_service_tag()