diff --git a/cura/Settings/MachineManager.py b/cura/Settings/MachineManager.py
index 6f1b82a7b8..96ccc89ccf 100755
--- a/cura/Settings/MachineManager.py
+++ b/cura/Settings/MachineManager.py
@@ -16,7 +16,7 @@ from UM.Settings.ContainerRegistry import ContainerRegistry
 from UM.Settings.ContainerStack import ContainerStack
 from UM.Settings.InstanceContainer import InstanceContainer
 from UM.Settings.SettingFunction import SettingFunction
-from UM.Signal import postponeSignals
+from UM.Signal import postponeSignals, CompressTechnique
 import UM.FlameProfiler
 
 from cura.QualityManager import QualityManager
@@ -705,7 +705,7 @@ class MachineManager(QObject):
     #  Depending on from/to material+current variant, a quality profile is chosen and set.
     @pyqtSlot(str)
     def setActiveMaterial(self, material_id: str):
-        with postponeSignals(*self._getContainerChangedSignals()):
+        with postponeSignals(*self._getContainerChangedSignals(), compress = CompressTechnique.CompressPerParameterValue):
             containers = ContainerRegistry.getInstance().findInstanceContainers(id = material_id)
             if not containers or not self._active_container_stack:
                 return
@@ -770,7 +770,7 @@ class MachineManager(QObject):
 
     @pyqtSlot(str)
     def setActiveVariant(self, variant_id: str):
-        with postponeSignals(*self._getContainerChangedSignals()):
+        with postponeSignals(*self._getContainerChangedSignals(), compress = CompressTechnique.CompressPerParameterValue):
             containers = ContainerRegistry.getInstance().findInstanceContainers(id = variant_id)
             if not containers or not self._active_container_stack:
                 return
@@ -781,7 +781,7 @@ class MachineManager(QObject):
                 self.blurSettings.emit()
                 self._active_container_stack.variant = containers[0]
                 Logger.log("d", "Active variant changed to {active_variant_id}".format(active_variant_id = containers[0].getId()))
-                preferred_material = None
+                preferred_material_name = None
                 if old_material:
                     preferred_material_name = old_material.getName()
 
@@ -793,7 +793,7 @@ class MachineManager(QObject):
     #   \param quality_id The quality_id of either a quality or a quality_changes
     @pyqtSlot(str)
     def setActiveQuality(self, quality_id: str):
-        with postponeSignals(*self._getContainerChangedSignals(), compress = True):
+        with postponeSignals(*self._getContainerChangedSignals(), compress = CompressTechnique.CompressPerParameterValue):
             self.blurSettings.emit()
 
             containers = ContainerRegistry.getInstance().findInstanceContainers(id = quality_id)
diff --git a/plugins/XmlMaterialProfile/XmlMaterialProfile.py b/plugins/XmlMaterialProfile/XmlMaterialProfile.py
index bddb801030..7519565302 100644
--- a/plugins/XmlMaterialProfile/XmlMaterialProfile.py
+++ b/plugins/XmlMaterialProfile/XmlMaterialProfile.py
@@ -395,29 +395,13 @@ class XmlMaterialProfile(InstanceContainer):
     def getVersionFromSerialized(self, serialized: str) -> Optional[int]:
         data = ET.fromstring(serialized)
 
-        # get format version
-        version = None
-        metadata = data.iterfind("./um:metadata/*", self.__namespaces)
-        for entry in metadata:
-            tag_name = _tag_without_namespace(entry)
-            if tag_name == "version":
-                try:
-                    version = int(entry.text)
-                except Exception as e:
-                    raise InvalidInstanceError("Invalid version string '%s': %s" % (entry.text, e))
-                break
-        if version is None:
-            raise InvalidInstanceError("Missing version in metadata")
-
+        version = 1
         # get setting version
         if "version" in data.attrib:
             setting_version = self.xmlVersionToSettingVersion(data.attrib["version"])
         else:
             setting_version = self.xmlVersionToSettingVersion("1.2")
 
-        if version is None:
-            raise InvalidInstanceError("Missing version in metadata")
-
         return version * 1000000 + setting_version
 
     ##  Overridden from InstanceContainer
diff --git a/plugins/XmlMaterialProfile/XmlMaterialUpgrader.py b/plugins/XmlMaterialProfile/XmlMaterialUpgrader.py
index 8f1d1e9ec6..ad20a44c28 100644
--- a/plugins/XmlMaterialProfile/XmlMaterialUpgrader.py
+++ b/plugins/XmlMaterialProfile/XmlMaterialUpgrader.py
@@ -10,29 +10,13 @@ class XmlMaterialUpgrader(VersionUpgrade):
     def getXmlVersion(self, serialized):
         data = ET.fromstring(serialized)
 
-        # get format version
-        version = None
-        metadata = data.iterfind("./um:metadata/*")
-        for entry in metadata:
-            tag_name = entry.tag
-            if tag_name == "version":
-                try:
-                    version = int(entry.text)
-                except Exception as e:
-                    raise ValueError("Invalid version string '%s': %s" % (entry.text, e))
-                break
-        if version is None:
-            raise RuntimeError("Missing version in metadata")
-
+        version = 1
         # get setting version
         if "version" in data.attrib:
             setting_version = self._xmlVersionToSettingVersion(data.attrib["version"])
         else:
             setting_version = self._xmlVersionToSettingVersion("1.2")
 
-        if version is None:
-            raise RuntimeError("Missing version in metadata")
-
         return version * 1000000 + setting_version
 
     def _xmlVersionToSettingVersion(self, xml_version: str) -> int:
diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index bea23144c1..8372be8f6a 100755
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -1157,7 +1157,6 @@
                     "type": "[int]",
                     "default_value": "[ ]",
                     "enabled": "infill_pattern != 'concentric' and infill_pattern != 'concentric_3d' and infill_pattern != 'cubicsubdiv'",
-                    "enabled": "infill_sparse_density > 0",
                     "settable_per_mesh": true
                 },
                 "spaghetti_infill_enabled":