diff --git a/plugins/XmlMaterialProfile/XmlMaterialProfile.py b/plugins/XmlMaterialProfile/XmlMaterialProfile.py
index f8cd2dda71..10a3a09c68 100644
--- a/plugins/XmlMaterialProfile/XmlMaterialProfile.py
+++ b/plugins/XmlMaterialProfile/XmlMaterialProfile.py
@@ -1186,7 +1186,7 @@ class XmlMaterialProfile(InstanceContainer):
     def __str__(self):
         return "<XmlMaterialProfile '{my_id}' ('{name}') from base file '{base_file}'>".format(my_id = self.getId(), name = self.getName(), base_file = self.getMetaDataEntry("base_file"))
 
-    _metadata_tags_that_have_cura_namespace = ["pva_compatible", "breakaway_compatible"]
+    _metadata_tags_that_have_cura_namespace = {"pva_compatible", "breakaway_compatible"}
 
     # Map XML file setting names to internal names
     __material_settings_setting_map = {
diff --git a/resources/bundled_packages/cura.json b/resources/bundled_packages/cura.json
index b132a3ea62..4d23d56e5c 100644
--- a/resources/bundled_packages/cura.json
+++ b/resources/bundled_packages/cura.json
@@ -764,6 +764,23 @@
             }
         }
     },
+    "VersionUpgrade41to42": {
+        "package_info": {
+            "package_id": "VersionUpgrade41to42",
+            "package_type": "plugin",
+            "display_name": "Version Upgrade 4.1 to 4.2",
+            "description": "Upgrades configurations from Cura 4.1 to Cura 4.2.",
+            "package_version": "1.0.0",
+            "sdk_version": "6.0.0",
+            "website": "https://ultimaker.com",
+            "author": {
+                "author_id": "UltimakerPackages",
+                "display_name": "Ultimaker B.V.",
+                "email": "plugins@ultimaker.com",
+                "website": "https://ultimaker.com"
+            }
+        }
+    },
     "VersionUpgrade42to43": {
         "package_info": {
             "package_id": "VersionUpgrade42to43",