diff --git a/plugins/VersionUpgrade/VersionUpgrade34to40/VersionUpgrade34to40.py b/plugins/VersionUpgrade/VersionUpgrade34to40/VersionUpgrade34to40.py
index 593655a046..aacae2cfcf 100644
--- a/plugins/VersionUpgrade/VersionUpgrade34to40/VersionUpgrade34to40.py
+++ b/plugins/VersionUpgrade/VersionUpgrade34to40/VersionUpgrade34to40.py
@@ -6,6 +6,7 @@ import io
 
 from UM.VersionUpgrade import VersionUpgrade
 
+deleted_settings = {"prime_tower_wall_thickness"}
 
 ##  Upgrades configurations from the state they were in at version 3.4 to the
 #   state they should be in at version 4.0.
@@ -68,6 +69,9 @@ class VersionUpgrade34to40(VersionUpgrade):
         parser["metadata"]["setting_version"] = "5"
 
         self._resetConcentric3DInfillPattern(parser)
+        if "values" in parser:
+            for deleted_setting in deleted_settings:
+                del parser["values"][deleted_setting]
 
         result = io.StringIO()
         parser.write(result)
diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index b458316686..710dcbb87f 100644
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -4998,26 +4998,7 @@
                     "maximum_value_warning": "round((resolveOrValue('prime_tower_size') * 0.5) ** 2 * 3.14159 * resolveOrValue('layer_height'), 2) if prime_tower_circular else resolveOrValue('prime_tower_size') ** 2 * resolveOrValue('layer_height')",
                     "enabled": "resolveOrValue('prime_tower_enable')",
                     "settable_per_mesh": false,
-                    "settable_per_extruder": true,
-                    "children":
-                    {
-                        "prime_tower_wall_thickness":
-                        {
-                            "label": "Prime Tower Thickness",
-                            "description": "The thickness of the hollow prime tower. A thickness larger than half the Prime Tower Minimum Volume will result in a dense prime tower.",
-                            "unit": "mm",
-                            "type": "float",
-                            "default_value": 2,
-                            "value": "round(max(2 * prime_tower_line_width, (0.5 * (prime_tower_size - math.sqrt(max(0, prime_tower_size ** 2 - 4 * prime_tower_min_volume / (3.14159 * layer_height))))) if prime_tower_circular else (0.5 * (prime_tower_size - math.sqrt(max(0, prime_tower_size ** 2 - prime_tower_min_volume / layer_height))))), 3)",
-                            "resolve": "max(extruderValues('prime_tower_wall_thickness'))",
-                            "minimum_value": "0.001",
-                            "minimum_value_warning": "2 * min(extruderValues('prime_tower_line_width')) - 0.0001",
-                            "maximum_value_warning": "prime_tower_size / 2",
-                            "enabled": "prime_tower_enable",
-                            "settable_per_mesh": false,
-                            "settable_per_extruder": false
-                        }
-                    }
+                    "settable_per_extruder": true
                 },
                 "prime_tower_position_x":
                 {