diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index 60c5225cc0..dcd3284b36 100755
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -868,7 +868,6 @@
                     "description": "The extruder train used for printing the walls. This is used in multi-extrusion.",
                     "type": "optional_extruder",
                     "default_value": "-1",
-                    "value": "-1",
                     "settable_per_mesh": true,
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": true,
@@ -952,7 +951,6 @@
                     "description": "The extruder train used for printing the top most skin. This is used in multi-extrusion.",
                     "type": "optional_extruder",
                     "default_value": "-1",
-                    "value": "-1",
                     "settable_per_mesh": true,
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": true,
@@ -992,7 +990,6 @@
                     "description": "The extruder train used for printing the top and bottom skin. This is used in multi-extrusion.",
                     "type": "optional_extruder",
                     "default_value": "-1",
-                    "value": "-1",
                     "settable_per_mesh": true,
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": true,
@@ -1298,7 +1295,6 @@
                     "description": "The extruder train used for printing infill. This is used in multi-extrusion.",
                     "type": "optional_extruder",
                     "default_value": "-1",
-                    "value": "-1",
                     "settable_per_mesh": true,
                     "settable_per_extruder": false,
                     "settable_per_meshgroup": true,