Fix ComputeConflictError import

gns3server/controller/node.py

@@ -24,7 +24,8 @@ import os
 from .controller_error import (
     ControllerError,
     ControllerTimeoutError,
-    ComputeError
+    ComputeError,
+    ComputeConflictError
 )
 from .ports.port_factory import PortFactory, StandardPortFactory, DynamipsPortFactory
 from ..utils.images import images_directories
@@ -403,7 +404,7 @@ class Node:
                 response = await self._compute.post(
                     f"/projects/{self._project.id}/{self._node_type}/nodes", data=data, timeout=timeout
                 )
-            except ComputeConflict as e:
+            except ComputeConflictError as e:
                 if e.response.get("exception") == "ImageMissingError":
                     res = await self._upload_missing_image(self._node_type, e.response["image"])
                     if not res: