diff --git a/rero_ils/modules/items/jsonschemas/items/item-v0.0.1.json b/rero_ils/modules/items/jsonschemas/items/item-v0.0.1.json
index 82e0ddd3a9..4bcc7ee6cf 100644
--- a/rero_ils/modules/items/jsonschemas/items/item-v0.0.1.json
+++ b/rero_ils/modules/items/jsonschemas/items/item-v0.0.1.json
@@ -9,8 +9,6 @@
     "pid",
     "organisation",
     "library",
-    "location",
-    "item_type",
     "type",
     "document",
     "status"
@@ -145,7 +143,8 @@
       "widget": {
         "formlyConfig": {
           "expressions": {
-            "hide": "field?.parent?.model && field.parent.model.type === 'issue'"
+            "props.required": "field?.parent?.model?.type !== 'issue'",
+            "hide": "field?.parent?.model?.type === 'issue'"
           },
           "props": {
             "cssClass": "editor-title"
@@ -191,7 +190,8 @@
       "widget": {
         "formlyConfig": {
           "expressions": {
-            "hide": "field?.parent?.model && field.parent.model.type === 'issue'"
+            "props.required": "field?.parent?.model?.type !== 'issue'",
+            "hide": "field?.parent?.model?.type === 'issue'"
           },
           "props": {
             "cssClass": "editor-title"