diff --git a/cura/Settings/SettingOverrideDecorator.py b/cura/Settings/SettingOverrideDecorator.py
index a662027d8f..27ae1d69f0 100644
--- a/cura/Settings/SettingOverrideDecorator.py
+++ b/cura/Settings/SettingOverrideDecorator.py
@@ -63,7 +63,7 @@ class SettingOverrideDecorator(SceneNodeDecorator):
         instance_container = copy.deepcopy(self._stack.getContainer(0), memo)
 
         # A unique name must be added, or replaceContainer will not replace it
-        instance_container.setMetaDataEntry("id", self._generateUniqueName)
+        instance_container.setMetaDataEntry("id", self._generateUniqueName())
 
         ## Set the copied instance as the first (and only) instance container of the stack.
         deep_copy._stack.replaceContainer(0, instance_container)
diff --git a/resources/qml/Preferences/GeneralPage.qml b/resources/qml/Preferences/GeneralPage.qml
index 7841c7d506..5de74ac3a8 100644
--- a/resources/qml/Preferences/GeneralPage.qml
+++ b/resources/qml/Preferences/GeneralPage.qml
@@ -170,7 +170,7 @@ UM.PreferencesPage
                             append({ text: "日本語", code: "ja_JP" })
                             append({ text: "한국어", code: "ko_KR" })
                             append({ text: "Nederlands", code: "nl_NL" })
-                            append({ text: "Polski", code: "pl_PL" })
+                            //Polish is disabled for being incomplete: append({ text: "Polski", code: "pl_PL" })
                             append({ text: "Português do Brasil", code: "pt_BR" })
                             append({ text: "Português", code: "pt_PT" })
                             append({ text: "Русский", code: "ru_RU" })