diff --git a/plugins/XmlMaterialProfile/XmlMaterialProfile.py b/plugins/XmlMaterialProfile/XmlMaterialProfile.py
index 84b78c1d6a..01294930ea 100644
--- a/plugins/XmlMaterialProfile/XmlMaterialProfile.py
+++ b/plugins/XmlMaterialProfile/XmlMaterialProfile.py
@@ -21,13 +21,11 @@ class XmlMaterialProfile(UM.Settings.InstanceContainer):
     ##  Overridden from InstanceContainer
     def duplicate(self, new_id, new_name = None):
         base_file = self.getMetaDataEntry("base_file", None)
-        new_uuid = str(uuid.uuid4())
 
         if base_file:
             containers = UM.Settings.ContainerRegistry.getInstance().findInstanceContainers(id = base_file)
             if containers:
                 new_basefile = containers[0].duplicate(self.getMetaDataEntry("brand") + "_" + new_id, new_name)
-                new_basefile.setMetaDataEntry("GUID", new_uuid)
                 base_file = new_basefile.id
                 UM.Settings.ContainerRegistry.getInstance().addContainer(new_basefile)
 
@@ -39,7 +37,6 @@ class XmlMaterialProfile(UM.Settings.InstanceContainer):
                         new_id += "_" + variant_containers[0].getName().replace(" ", "_")
 
         result = super().duplicate(new_id, new_name)
-        result.setMetaDataEntry("GUID", new_uuid)
         if result.getMetaDataEntry("base_file", None):
             result.setMetaDataEntry("base_file", base_file)
         return result
diff --git a/resources/qml/Preferences/MaterialsPage.qml b/resources/qml/Preferences/MaterialsPage.qml
index f4a8df1dcf..a5bca7fe42 100644
--- a/resources/qml/Preferences/MaterialsPage.qml
+++ b/resources/qml/Preferences/MaterialsPage.qml
@@ -67,8 +67,6 @@ UM.ManagementPage
             enabled: base.currentItem != null && base.currentItem.id != Cura.MachineManager.activeMaterialId
             onClicked: Cura.MachineManager.setActiveMaterial(base.currentItem.id)
         },
-        /*
-        // disabled because it has a lot of issues
         Button
         {
             text: catalog.i18nc("@action:button", "Duplicate");
@@ -91,7 +89,7 @@ UM.ManagementPage
 
                 Cura.MachineManager.setActiveMaterial(material_id)
             }
-        }, */
+        },
         Button
         {
             text: catalog.i18nc("@action:button", "Remove");
@@ -188,7 +186,7 @@ UM.ManagementPage
             object: base.currentItem != null ? base.currentItem.name : ""
             onYes:
             {
-                var containers = Cura.ContainerManager.findInstanceContainers({"GUID": base.currentItem.metadata.GUID})
+                var containers = Cura.ContainerManager.findInstanceContainers({"id": base.currentItem.id})
                 for(var i in containers)
                 {
                     Cura.ContainerManager.removeContainer(containers[i])