diff --git a/plugins/VersionUpgrade/VersionUpgrade46to47/VersionUpgrade46to47.py b/plugins/VersionUpgrade/VersionUpgrade46to47/VersionUpgrade46to47.py
index ba3bd0ed85..b5eee0c9ce 100644
--- a/plugins/VersionUpgrade/VersionUpgrade46to47/VersionUpgrade46to47.py
+++ b/plugins/VersionUpgrade/VersionUpgrade46to47/VersionUpgrade46to47.py
@@ -55,15 +55,15 @@ class VersionUpgrade46to47(VersionUpgrade):
         parser.write(result)
         return [filename], [result.getvalue()]
 
-    def upgradeDefinitionChanges(self, serialized: str, filename: str) -> Tuple[List[str], List[str]]:
+    def upgradeExtruderInstanceContainer(self, serialized: str, filename: str) -> Tuple[List[str], List[str]]:
         """
-        Upgrades definition changes files to the new version number.
+        Upgrades per-extruder instance containers to the new version number.
 
         This applies all of the changes that are applied in other instance
         containers as well.
 
-        In the case of Deltacomb printers, it splits the 2 extruder definition
-        changes into 4.
+        In the case of Deltacomb printers, it splits the 2 extruders into 4 and
+        changes the definition.
         :param serialized: The original contents of the instance container.
         :param filename: The original file name of the instance container.
         :return: A list of new file names, and a list of the new contents for
@@ -170,14 +170,16 @@ class VersionUpgrade46to47(VersionUpgrade):
                     extruder3 = copy.copy(parser)
                     extruder3["metadata"]["position"] = "2"
                     extruder3["containers"]["0"] += "_e2_upgrade"
+                    extruder3["containers"]["1"] += "_e2_upgrade"
                     extruder3["containers"]["6"] += "_e2_upgrade"
                     extruder3["containers"]["7"] = "deltacomb_base_extuder_2"
                     result_parsers.append(extruder3)
                     result_filenames.append(filename[:-len(".extruder.cfg")] + "_e2_upgrade.extruder.cfg")
                     extruder4 = copy.copy(parser)
                     extruder4["metadata"]["position"] = "3"
-                    extruder4["containers"]["0"] += ".inst.cfg_e3_upgrade"
-                    extruder4["containers"]["6"] += ".inst.cfg_e3_upgrade"
+                    extruder4["containers"]["0"] += "_e3_upgrade"
+                    extruder4["containers"]["1"] += "_e3_upgrade"
+                    extruder4["containers"]["6"] += "_e3_upgrade"
                     extruder4["containers"]["7"] = "deltacomb_base_extruder_3"
                     result_parsers.append(extruder4)
                     result_filenames.append(filename[:-len(".extruder.cfg")] + "_e3_upgrade.extruder.cfg")
diff --git a/plugins/VersionUpgrade/VersionUpgrade46to47/__init__.py b/plugins/VersionUpgrade/VersionUpgrade46to47/__init__.py
index 288fe8c164..fc253989fa 100644
--- a/plugins/VersionUpgrade/VersionUpgrade46to47/__init__.py
+++ b/plugins/VersionUpgrade/VersionUpgrade46to47/__init__.py
@@ -17,10 +17,10 @@ def getMetaData() -> Dict[str, Any]:
             ("preferences", 6000012):        ("preferences", 6000013,        upgrade.upgradePreferences),
             ("machine_stack", 4000012):      ("machine_stack", 4000013,      upgrade.upgradeStack),
             ("extruder_train", 4000012):     ("extruder_train", 4000013,     upgrade.upgradeStack),
-            ("definition_changes", 4000012): ("definition_changes", 4000013, upgrade.upgradeDefinitionChanges),
-            ("quality_changes", 4000012):    ("quality_changes", 4000013,    upgrade.upgradeInstanceContainer),
-            ("quality", 4000012):            ("quality", 4000013,            upgrade.upgradeInstanceContainer),
-            ("user", 4000012):               ("user", 4000013,               upgrade.upgradeInstanceContainer),
+            ("definition_changes", 4000012): ("definition_changes", 4000013, upgrade.upgradeExtruderInstanceContainer),
+            ("quality_changes", 4000012):    ("quality_changes", 4000013,    upgrade.upgradeExtruderInstanceContainer),
+            ("quality", 4000012):            ("quality", 4000013,            upgrade.upgradeExtruderInstanceContainer),
+            ("user", 4000012):               ("user", 4000013,               upgrade.upgradeExtruderInstanceContainer),
         },
         "sources": {
             "preferences": {