diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index 5a7cca5a31..817da65247 100755
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -869,7 +869,7 @@
                     "description": "The extruder train used for printing the outer wall. This is used in multi-extrusion.",
                     "type": "optional_extruder",
                     "default_value": "-1",
-                    "settable_per_mesh": true,
+                    "settable_per_mesh": false,
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": true,
                     "settable_globally": true,
@@ -881,7 +881,7 @@
                     "description": "The extruder train used for printing the inner walls. This is used in multi-extrusion.",
                     "type": "optional_extruder",
                     "default_value": "-1",
-                    "settable_per_mesh": true,
+                    "settable_per_mesh": false,
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": true,
                     "settable_globally": true,
@@ -936,7 +936,7 @@
                     "type": "optional_extruder",
                     "default_value": "-1",
                     "value": "top_bottom_extruder_nr",
-                    "settable_per_mesh": true,
+                    "settable_per_mesh": false,
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": true,
                     "settable_globally": true,
@@ -989,7 +989,7 @@
                     "description": "The extruder train used for printing the top and bottom skin. This is used in multi-extrusion.",
                     "type": "optional_extruder",
                     "default_value": "-1",
-                    "settable_per_mesh": true,
+                    "settable_per_mesh": false,
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": true,
                     "settable_globally": true,
@@ -1312,7 +1312,7 @@
                     "description": "The extruder train used for printing infill. This is used in multi-extrusion.",
                     "type": "optional_extruder",
                     "default_value": "-1",
-                    "settable_per_mesh": true,
+                    "settable_per_mesh": false,
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": true,
                     "settable_globally": true,