diff --git a/release-note.md b/release-note.md
index 3b151e7..cc352e6 100644
--- a/release-note.md
+++ b/release-note.md
@@ -29,7 +29,8 @@
 - [IFS0X] 12.09.2024 issue #220 Removed min and max for date types
 - [IFS0X] 13.09.2024 issue #218 Modified the scale of values assigned to the SDG cases by enabling the possibility of entering greading with 'letters' (Example: from A to D).
 - [IFS01, IFS06, IFS07] 17.09.2024 issue #222 Restored the management of the cursor with the filter parameters sent also in subsequent invocations
-- [IFS04.4, IFS0.4] 03.10.2024 fixed the response of ifs04.4 and ifs05.4 
+- [IFS04.4, IFS05.4] 03.10.2024 fixed the response of ifs04.4 and ifs05.4 
+- [IFS04.1] 03.0.2024 issue #224 Removed the nullable property from the attribute_name parameter
 
 ## Version 2.0.5
 - [IFS01.2] It was added the curriculum description of the learnings list
diff --git a/src/IFS04-rettifica-iscrizioni.yaml b/src/IFS04-rettifica-iscrizioni.yaml
index ac5f2e3..4ebaa0b 100644
--- a/src/IFS04-rettifica-iscrizioni.yaml
+++ b/src/IFS04-rettifica-iscrizioni.yaml
@@ -670,7 +670,6 @@ components:
       properties:
         attribute_name:
           type: string
-          nullable: true
           description: Attribute name to be changed  / Nome attributo da variare in fase di rettifica iscrizione
           minLength: 1
           maxLength: 256