diff --git a/cura/Settings/SettingInheritanceManager.py b/cura/Settings/SettingInheritanceManager.py
index 49cf5c7c83..ff0d1d81c0 100644
--- a/cura/Settings/SettingInheritanceManager.py
+++ b/cura/Settings/SettingInheritanceManager.py
@@ -110,12 +110,12 @@ class SettingInheritanceManager(QObject):
                 settings_with_inheritance_warning_changed = True
 
             parent = definitions[0].parent
-            if parent is None:
-                return
-            
             # Find the topmost parent (Assumed to be a category)
-            while parent.parent is not None:
-                parent = parent.parent
+            if parent is not None:
+                while parent.parent is not None:
+                    parent = parent.parent
+            else:
+                parent = definitions[0]  # Already at a category
 
             if parent.key not in self._settings_with_inheritance_warning and has_overwritten_inheritance:
                 # Category was not in the list yet, so needs to be added now.