diff --git a/plugins/VersionUpgrade/VersionUpgrade26to27/VersionUpgrade26to27.py b/plugins/VersionUpgrade/VersionUpgrade26to27/VersionUpgrade26to27.py
index e2d7817077..4df64af95b 100644
--- a/plugins/VersionUpgrade/VersionUpgrade26to27/VersionUpgrade26to27.py
+++ b/plugins/VersionUpgrade/VersionUpgrade26to27/VersionUpgrade26to27.py
@@ -104,6 +104,11 @@ class VersionUpgrade26to27(VersionUpgrade):
             parser["metadata"] = {}
         parser["metadata"]["setting_version"] = "2"
 
+        #Renamed setting value for g-code flavour.
+        if "values" in parser and "machine_gcode_flavor" in parser["values"]:
+            if parser["values"]["machine_gcode_flavor"] == "RepRap (Volumatric)":
+                parser["values"]["machine_gcode_flavor"] = "RepRap (Volumetric)"
+
         # Re-serialise the file.
         output = io.StringIO()
         parser.write(output)
diff --git a/resources/definitions/fdmprinter.def.json b/resources/definitions/fdmprinter.def.json
index 5c7c246f58..cc73a675c7 100755
--- a/resources/definitions/fdmprinter.def.json
+++ b/resources/definitions/fdmprinter.def.json
@@ -833,6 +833,7 @@
                             "unit": "%",
                             "default_value": 100.0,
                             "minimum_value": "0.001",
+                            "maximum_value_warning": "150",
                             "settable_per_mesh": false,
                             "settable_per_extruder": true
                         }