diff --git a/misc/config_tools/configurator/packages/configurator/src/pages/Config.vue b/misc/config_tools/configurator/packages/configurator/src/pages/Config.vue
index bc3748b04..6d624859e 100644
--- a/misc/config_tools/configurator/packages/configurator/src/pages/Config.vue
+++ b/misc/config_tools/configurator/packages/configurator/src/pages/Config.vue
@@ -214,16 +214,6 @@ export default {
           this.currentFormData = this.scenario.vm[i]
         }
       }
-      if (this.currentFormData['load_order'] === 'SERVICE_VM') {
-        if (this.currentFormData.hasOwnProperty('vm_type')) {
-          delete this.schemas.ServiceVM.BasicConfigType.properties.vm_type
-        } else {
-          if (this.schemas.ServiceVM.BasicConfigType.properties.hasOwnProperty('vm_type') === false) {
-            this.schemas.ServiceVM.BasicConfigType.properties.vm_type =
-              {$ref: '#/definitions/BasicVMType', title: 'VM type', description: '<p>Select the VM type. A standard VM (<span class=…ial features for time-sensitive applications.</p>'}
-          }
-        }
-      }
     },
     switchTab(tabVMID) {
       this.activeVMID = tabVMID;
diff --git a/misc/config_tools/scenario_config/jsonschema/converter.py b/misc/config_tools/scenario_config/jsonschema/converter.py
index 8274c1bf0..47417b82a 100644
--- a/misc/config_tools/scenario_config/jsonschema/converter.py
+++ b/misc/config_tools/scenario_config/jsonschema/converter.py
@@ -189,15 +189,19 @@ class XS2JS:
             if 'xs:enumeration' in restriction:
                 type_func = {"string": str, "integer": int}.get(js_st['type'], str)
                 # enum
+                enum_elements = restriction['xs:enumeration']
+                if not isinstance(enum_elements, list):
+                    enum_elements = [enum_elements]
+
                 enum = []
-                for enum_element in restriction['xs:enumeration']:
+                for enum_element in enum_elements:
                     enum.append(type_func(enum_element['@value']))
                 js_st["enum"] = enum
 
                 # enumNames
-                if enum and '@acrn:title' in restriction['xs:enumeration'][0].get('xs:annotation', {}):
+                if enum and '@acrn:title' in enum_elements[0].get('xs:annotation', {}):
                     enum_names = []
-                    for enum_element in restriction['xs:enumeration']:
+                    for enum_element in enum_elements:
                         if 'xs:annotation' in enum_element and '@acrn:title' in enum_element.get('xs:annotation', {}):
                             enum_names.append(enum_element['xs:annotation']['@acrn:title'])
                         else:
diff --git a/misc/config_tools/schema/VMtypes.xsd b/misc/config_tools/schema/VMtypes.xsd
index 5caedefb6..e7feb48c0 100644
--- a/misc/config_tools/schema/VMtypes.xsd
+++ b/misc/config_tools/schema/VMtypes.xsd
@@ -22,13 +22,13 @@
   <xs:annotation>
     <xs:documentation>Current supported VM types are:
 
-- ``Real-time`` for time-sensitive applications.
+- ``Real-time`` for time-sensitive applications (not applicable to the service VM).
 - ``Standard`` for general-purpose applications, such as human-machine interface (HMI).
 </xs:documentation>
   </xs:annotation>
   <xs:restriction base="xs:string">
-    <xs:enumeration value="RTVM">
-      <xs:annotation acrn:title="Real-time" />
+    <xs:enumeration value="RTVM" >
+      <xs:annotation acrn:title="Real-time" acrn:applicable-vms="pre-launched, post-launched" />
     </xs:enumeration>
     <xs:enumeration value="STANDARD_VM">
       <xs:annotation acrn:title="Standard" />