diff --git a/openbis_ng_ui/src/js/components/types/objectType/ObjectTypeHandlerValidate.js b/openbis_ng_ui/src/js/components/types/objectType/ObjectTypeHandlerValidate.js
index 64c588ec45af99a7b140035cd22fe76b433f9ced..4a2ad1c417289bbee32b1a3f07013d002ed56ab6 100644
--- a/openbis_ng_ui/src/js/components/types/objectType/ObjectTypeHandlerValidate.js
+++ b/openbis_ng_ui/src/js/components/types/objectType/ObjectTypeHandlerValidate.js
@@ -145,10 +145,18 @@ export default class ObjectTypeHandlerValidate {
       )
     }
 
-    const wasMandatory = property.original ? property.original.mandatory : false
-    const isMandatory = property.mandatory
-
-    if (property.usages > 0 && !wasMandatory && isMandatory) {
+    const typeIsUsed = type.usages > 0
+    const propertyIsNew = !property.original
+    const propertyIsMandatory = property.mandatory
+    const propertyWasMandatory = property.original
+      ? property.original.mandatory
+      : false
+
+    if (
+      typeIsUsed &&
+      propertyIsMandatory &&
+      (propertyIsNew || !propertyWasMandatory)
+    ) {
       this.validateNotEmpty(
         'Initial Value',
         'initialValueForExistingEntities',
diff --git a/openbis_ng_ui/src/js/components/types/objectType/ObjectTypeParametersProperty.jsx b/openbis_ng_ui/src/js/components/types/objectType/ObjectTypeParametersProperty.jsx
index 7aae1e80048180ab35343f8db9a04cce27ea635c..6d6a6ad7f86de7bfa7a73fab643af9a99184b3d5 100644
--- a/openbis_ng_ui/src/js/components/types/objectType/ObjectTypeParametersProperty.jsx
+++ b/openbis_ng_ui/src/js/components/types/objectType/ObjectTypeParametersProperty.jsx
@@ -468,12 +468,20 @@ class ObjectTypeParametersProperty extends React.PureComponent {
   }
 
   renderInitialValue(property) {
-    const { classes } = this.props
-
-    const wasMandatory = property.original ? property.original.mandatory : false
-    const isMandatory = property.mandatory
-
-    if (property.usages > 0 && !wasMandatory && isMandatory) {
+    const { classes, type } = this.props
+
+    const typeIsUsed = type.usages > 0
+    const propertyIsNew = !property.original
+    const propertyIsMandatory = property.mandatory
+    const propertyWasMandatory = property.original
+      ? property.original.mandatory
+      : false
+
+    if (
+      typeIsUsed &&
+      propertyIsMandatory &&
+      (propertyIsNew || !propertyWasMandatory)
+    ) {
       return (
         <div className={classes.field}>
           <TextField