diff --git a/gns3server/compute/base_manager.py b/gns3server/compute/base_manager.py
index 269c9ab1..dd3d7a6f 100644
--- a/gns3server/compute/base_manager.py
+++ b/gns3server/compute/base_manager.py
@@ -282,7 +282,7 @@ class BaseManager:
         # We force a refresh of the name. This force the rewrite
         # of some configuration files
         node_name = destination_node.name
-        destination_node.name = node_name + "tmp"
+        destination_node.name = node_name + str(uuid4())
         destination_node.name = node_name
 
         return destination_node
diff --git a/gns3server/compute/dynamips/__init__.py b/gns3server/compute/dynamips/__init__.py
index 318cc1b4..000a2e53 100644
--- a/gns3server/compute/dynamips/__init__.py
+++ b/gns3server/compute/dynamips/__init__.py
@@ -614,7 +614,7 @@ class Dynamips(BaseManager):
         source_node = self.get_node(source_node_id)
         destination_node = self.get_node(destination_node_id)
 
-        # Non router gears
+        # Not a Dynamips router
         if not hasattr(source_node, "startup_config_path"):
             return (yield from super().duplicate_node(source_node_id, destination_node_id))
 
diff --git a/gns3server/controller/project.py b/gns3server/controller/project.py
index 25acfc3a..1523d0b9 100644
--- a/gns3server/controller/project.py
+++ b/gns3server/controller/project.py
@@ -897,7 +897,7 @@ class Project:
         :returns: New node
         """
         if node.status != "stopped" and not node.is_always_running():
-            raise aiohttp.web.HTTPConflict(text="Can't duplicate node data while is running")
+            raise aiohttp.web.HTTPConflict(text="Cannot duplicate node data while the node is running")
 
         data = copy.deepcopy(node.__json__(topology_dump=True))
         # Some properties like internal ID should not be duplicate
@@ -927,7 +927,7 @@ class Project:
             })
         except aiohttp.web.HTTPNotFound as e:
             yield from self.delete_node(new_node_uuid)
-            raise aiohttp.web.HTTPConflict(text="You can't duplicate this node type")
+            raise aiohttp.web.HTTPConflict(text="This node type cannot be duplicated")
         except aiohttp.web.HTTPConflict as e:
             yield from self.delete_node(new_node_uuid)
             raise e