diff --git a/cura/Settings/MachineManager.py b/cura/Settings/MachineManager.py
index 21810d394c..1272e043c4 100755
--- a/cura/Settings/MachineManager.py
+++ b/cura/Settings/MachineManager.py
@@ -1020,11 +1020,10 @@ class MachineManager(QObject):
         quality_type = quality_changes_group.quality_type
         # A custom quality can be created based on "not supported".
         # In that case, do not set quality containers to empty.
-        if quality_type == "not_supported":
-            quality_group = None
-        else:
+        quality_group = None
+        if quality_type != "not_supported":
             quality_group_dict = self._quality_manager.getQualityGroups(self._global_container_stack)
-            quality_group = quality_group_dict[quality_type]
+            quality_group = quality_group_dict.get(quality_type)
 
         quality_changes_container = self._empty_quality_changes_container
         if quality_changes_group.node_for_global: