diff --git a/sources/Forms/Block/AbstractFormBlock.php b/sources/Forms/Block/AbstractFormBlock.php
index a6e4f860d..826602ed1 100644
--- a/sources/Forms/Block/AbstractFormBlock.php
+++ b/sources/Forms/Block/AbstractFormBlock.php
@@ -134,8 +134,7 @@ abstract class AbstractFormBlock
 	 */
 	public function AddInput(string $sName, string $sType): void
 	{
-		$oFormInput = new FormInput($sName, $sType);
-		$oFormInput->SetOwnerBlock($this);
+		$oFormInput = new FormInput($sName, $sType, $this);
 		$this->aFormInputs[$oFormInput->GetName()] = $oFormInput;
 	}
 
@@ -167,8 +166,7 @@ abstract class AbstractFormBlock
 	 */
 	public function AddOutput(string $sName, string $sType, AbstractConverter $oConverter = null): void
 	{
-		$oFormOutput = new FormOutput($sName, $sType, $oConverter);
-		$oFormOutput->SetOwnerBlock($this);
+		$oFormOutput = new FormOutput($sName, $sType, $this, $oConverter);
 		$this->aFormOutputs[$oFormOutput->GetName()] = $oFormOutput;
 	}
 
diff --git a/sources/Forms/Block/IO/AbstractFormIO.php b/sources/Forms/Block/IO/AbstractFormIO.php
index ab678082d..4ffbf0932 100644
--- a/sources/Forms/Block/IO/AbstractFormIO.php
+++ b/sources/Forms/Block/IO/AbstractFormIO.php
@@ -38,10 +38,11 @@ class AbstractFormIO
 	 * @param string $sName name of the IO
 	 * @param string $sType type of the IO
 	 */
-	public function __construct(string $sName, string $sType)
+	public function __construct(string $sName, string $sType, AbstractFormBlock $oOwnerBlock)
 	{
 		$this->sName = $sName;
 		$this->sType = $sType;
+		$this->oOwnerBlock = $oOwnerBlock;
 	}
 
 	/**
@@ -54,20 +55,6 @@ class AbstractFormIO
 		return $this->oOwnerBlock;
 	}
 
-	/**
-	 * Set the owner block.
-	 *
-	 * @param AbstractFormBlock $oOwnerBlock
-	 *
-	 * @return $this
-	 */
-	public function SetOwnerBlock(AbstractFormBlock $oOwnerBlock): self
-	{
-		$this->oOwnerBlock = $oOwnerBlock;
-
-		return $this;
-	}
-
 	/**
 	 * Get the IO name.
 	 *
diff --git a/sources/Forms/Block/IO/FormOutput.php b/sources/Forms/Block/IO/FormOutput.php
index 29ca940ad..55cd68508 100644
--- a/sources/Forms/Block/IO/FormOutput.php
+++ b/sources/Forms/Block/IO/FormOutput.php
@@ -6,6 +6,7 @@
 
 namespace Combodo\iTop\Forms\Block\IO;
 
+use Combodo\iTop\Forms\Block\AbstractFormBlock;
 use Combodo\iTop\Forms\Block\IO\Converter\AbstractConverter;
 
 /**
@@ -27,9 +28,9 @@ class FormOutput extends AbstractFormIO
 	 * @param string $sType
 	 * @param AbstractConverter|null $oConverter
 	 */
-	public function __construct(string $sName, string $sType, AbstractConverter $oConverter = null)
+	public function __construct(string $sName, string $sType, AbstractFormBlock $oOwnerBlock, AbstractConverter $oConverter = null)
 	{
-		parent::__construct($sName, $sType);
+		parent::__construct($sName, $sType, $oOwnerBlock);
 		$this->oConverter = $oConverter;
 	}
 
diff --git a/sources/Forms/FormBuilder/DependencyMap.php b/sources/Forms/FormBuilder/DependencyMap.php
index 57b0f0f5d..88c05deac 100644
--- a/sources/Forms/FormBuilder/DependencyMap.php
+++ b/sources/Forms/FormBuilder/DependencyMap.php
@@ -121,6 +121,19 @@ class DependencyMap
 		return $aResult;
 	}
 
+	public function GetImpacted(string $sBlockName): array
+	{
+		$aImpacted = [];
+		foreach ($this->aOutputToInputsMap[$sBlockName] as $aBindings) {
+			foreach ($aBindings as $oBinding) {
+				$oDestBlock = $oBinding->oDestinationIO->GetOwnerBlock();
+				$aImpacted[] = $oDestBlock;
+			}
+		}
+
+		return $aImpacted;
+	}
+
 	/**
 	 * @param string $sBlockName
 	 *
diff --git a/tests/php-unit-tests/unitary-tests/sources/Forms/Block/IO/AbstractFormIOTest.php b/tests/php-unit-tests/unitary-tests/sources/Forms/Block/IO/AbstractFormIOTest.php
new file mode 100644
index 000000000..90c8ef381
--- /dev/null
+++ b/tests/php-unit-tests/unitary-tests/sources/Forms/Block/IO/AbstractFormIOTest.php
@@ -0,0 +1,15 @@
+<?php
+/*
+ * @copyright   Copyright (C) 2010-2025 Combodo SARL
+ * @license     http://opensource.org/licenses/AGPL-3.0
+ */
+
+namespace Combodo\iTop\Test\UnitTest\sources\Forms\Block\IO;
+
+use Combodo\iTop\Test\UnitTest\ItopDataTestCase;
+
+class AbstractFormIOTest extends ItopDataTestCase
+{
+
+
+}