Merge pull request #6458 from Ultimaker/CURA-6817_intent_fix_sync_config

Fix synchronise configurations (intent branch).

cura/Settings/MachineManager.py

@@ -1456,11 +1456,11 @@ class MachineManager(QObject):
                     # Find the material profile that the printer has stored.
                     # This might find one of the duplicates if the user duplicated the material to sync with. But that's okay; both have this GUID so both are correct.
                     approximate_diameter = int(self._global_container_stack.extruderList[int(position)].getApproximateMaterialDiameter())
-                    materials_with_guid = container_registry.findInstanceContainersMetadata(guid = extruder_configuration.material.guid, approximate_diameter = approximate_diameter)
+                    materials_with_guid = container_registry.findInstanceContainersMetadata(GUID = extruder_configuration.material.guid, approximate_diameter = str(approximate_diameter), ignore_case = True)
                     material_container_node = variant_node.preferredMaterial(approximate_diameter)
                     if materials_with_guid:  # We also have the material profile that the printer wants to share.
                         base_file = materials_with_guid[0]["base_file"]
-                        material_container_node = variant_node.materials.get(base_file, default = material_container_node)  # If Cura thinks that the selected material is not available for this printer, revert to the preferred material.
+                        material_container_node = variant_node.materials.get(base_file, material_container_node)
 
                     self._setMaterial(position, material_container_node)
                     self._global_container_stack.extruders[position].setEnabled(True)