diff --git a/cura/Machines/MaterialManager.py b/cura/Machines/MaterialManager.py
index 5d78f589c6..3a8634f605 100644
--- a/cura/Machines/MaterialManager.py
+++ b/cura/Machines/MaterialManager.py
@@ -9,6 +9,7 @@ from typing import Optional, TYPE_CHECKING
 from PyQt5.Qt import QTimer, QObject, pyqtSignal, pyqtSlot
 
 from UM.Application import Application
+from UM.ConfigurationErrorMessage import ConfigurationErrorMessage
 from UM.Logger import Logger
 from UM.Settings.ContainerRegistry import ContainerRegistry
 from UM.Settings.SettingFunction import SettingFunction
@@ -205,12 +206,10 @@ class MaterialManager(QObject):
                     machine_node.children_map[variant_name] = MaterialNode()
 
                 variant_node = machine_node.children_map[variant_name]
-                if root_material_id not in variant_node.material_map:
-                    variant_node.material_map[root_material_id] = MaterialNode(material_metadata)
-                else:
-                    # Sanity check: make sure we don't have duplicated variant-specific materials for the same machine
-                    raise RuntimeError("Found duplicate variant name [%s] for machine [%s] in material [%s]" %
-                                       (variant_name, definition, material_metadata["id"]))
+                if root_material_id in variant_node.material_map: #We shouldn't have duplicated variant-specific materials for the same machine.
+                    ConfigurationErrorMessage.getInstance().addFaultyContainers(root_material_id)
+                    continue
+                variant_node.material_map[root_material_id] = MaterialNode(material_metadata)
 
         self.materialsUpdated.emit()