diff --git a/datamodels/2.x/itop-service-mgmt/datamodel.itop-service-mgmt.xml b/datamodels/2.x/itop-service-mgmt/datamodel.itop-service-mgmt.xml
index 563fef5f3..472f59096 100755
--- a/datamodels/2.x/itop-service-mgmt/datamodel.itop-service-mgmt.xml
+++ b/datamodels/2.x/itop-service-mgmt/datamodel.itop-service-mgmt.xml
@@ -1017,7 +1017,7 @@
           </values>
           <sql>request_type</sql>
           <default_value>incident</default_value>
-          <is_null_allowed>true</is_null_allowed>
+          <is_null_allowed>false</is_null_allowed>
           <display_style>radio_horizontal</display_style>
         </field>
         <field id="status" xsi:type="AttributeEnum">