diff --git a/plugins/VersionUpgrade/VersionUpgrade48to49/VersionUpgrade48to49.py b/plugins/VersionUpgrade/VersionUpgrade48to49/VersionUpgrade48to49.py
index c0a61b1014..50e2bc09fa 100644
--- a/plugins/VersionUpgrade/VersionUpgrade48to49/VersionUpgrade48to49.py
+++ b/plugins/VersionUpgrade/VersionUpgrade48to49/VersionUpgrade48to49.py
@@ -36,51 +36,6 @@ class VersionUpgrade48to49(VersionUpgrade):
         parser.write(result)
         return [filename], [result.getvalue()]
 
-    def upgradeStack(self, serialized: str, filename: str) -> Tuple[List[str], List[str]]:
-        """
-        Upgrades stacks to have the new version number.
-
-        This updates the post-processing scripts with new parameters.
-        :param serialized: The original contents of the stack.
-        :param filename: The original file name of the stack.
-        :return: A list of new file names, and a list of the new contents for
-        those files.
-        """
-        parser = configparser.ConfigParser(interpolation = None)
-        parser.read_string(serialized)
-
-        # Update version number.
-        if "metadata" not in parser:
-            parser["metadata"] = {}
-        parser["metadata"]["setting_version"] = "17"
-
-        # Update Display Progress on LCD script parameters if present.
-        if "post_processing_scripts" in parser["metadata"]:
-            new_scripts_entries = []
-            for script_str in parser["metadata"]["post_processing_scripts"].split("\n"):
-                if not script_str:
-                    continue
-                script_str = script_str.replace(r"\\\n", "\n").replace(r"\\\\", "\\\\")  # Unescape escape sequences.
-                script_parser = configparser.ConfigParser(interpolation=None)
-                script_parser.optionxform = str  # type: ignore  # Don't transform the setting keys as they are case-sensitive.
-                script_parser.read_string(script_str)
-
-                # Update Display Progress on LCD parameters.
-                script_id = script_parser.sections()[0]
-                if script_id == "DisplayProgressOnLCD":
-                    script_parser[script_id]["time_remaining"] = "m117" if script_parser[script_id]["time_remaining"] == "True" else "none"
-
-                script_io = io.StringIO()
-                script_parser.write(script_io)
-                script_str = script_io.getvalue()
-                script_str = script_str.replace("\\\\", r"\\\\").replace("\n", r"\\\n")  # Escape newlines because configparser sees those as section delimiters.
-                new_scripts_entries.append(script_str)
-            parser["metadata"]["post_processing_scripts"] = "\n".join(new_scripts_entries)
-
-        result = io.StringIO()
-        parser.write(result)
-        return [filename], [result.getvalue()]
-
     def upgradeSettingVisibility(self, serialized: str, filename: str) -> Tuple[List[str], List[str]]:
         """
         Upgrades setting visibility to have a version number and move moved settings to a different category
diff --git a/plugins/VersionUpgrade/VersionUpgrade48to49/__init__.py b/plugins/VersionUpgrade/VersionUpgrade48to49/__init__.py
index a9ee18befc..808ca6c1ae 100644
--- a/plugins/VersionUpgrade/VersionUpgrade48to49/__init__.py
+++ b/plugins/VersionUpgrade/VersionUpgrade48to49/__init__.py
@@ -15,8 +15,6 @@ def getMetaData() -> Dict[str, Any]:
         "version_upgrade": {
             # From                           To                              Upgrade function
             ("preferences", 6000016):        ("preferences", 6000017,        upgrade.upgradePreferences),
-            ("machine_stack", 4000016):      ("machine_stack", 4000017,      upgrade.upgradeStack),
-            ("extruder_train", 4000016):     ("extruder_train", 4000017,     upgrade.upgradeStack),
             ("setting_visibility", 1000000): ("setting_visibility", 2000017, upgrade.upgradeSettingVisibility),
         },
         "sources": {
@@ -24,14 +22,6 @@ def getMetaData() -> Dict[str, Any]:
                 "get_version": upgrade.getCfgVersion,
                 "location": {"."}
             },
-            "machine_stack": {
-                "get_version": upgrade.getCfgVersion,
-                "location": {"./machine_instances"}
-            },
-            "extruder_train": {
-                "get_version": upgrade.getCfgVersion,
-                "location": {"./extruders"}
-            },
             "setting_visibility": {
                 "get_version": upgrade.getCfgVersion,
                 "location": {"./setting_visibility"}