diff --git a/core/coreexception.class.inc.php b/core/coreexception.class.inc.php
index 3365f8575..112c61ed1 100644
--- a/core/coreexception.class.inc.php
+++ b/core/coreexception.class.inc.php
@@ -183,11 +183,25 @@ class CoreCannotSaveObjectException extends CoreException
 	}
 }
 
+/**
+ * @since 2.7.0 N°2555
+ */
+class CorePortalInvalidActionRuleException extends CoreException
+{
+
+}
+
+/**
+ * @since 2.7.0 N°2555
+ */
 class CoreOqlException extends CoreException
 {
 
 }
 
+/**
+ * @since 2.7.0 N°2555
+ */
 class CoreOqlMultipleResultsForbiddenException extends CoreOqlException
 {
 
diff --git a/datamodels/2.x/itop-portal-base/portal/src/Helper/ContextManipulatorHelper.php b/datamodels/2.x/itop-portal-base/portal/src/Helper/ContextManipulatorHelper.php
index 31716ab00..5e986f169 100644
--- a/datamodels/2.x/itop-portal-base/portal/src/Helper/ContextManipulatorHelper.php
+++ b/datamodels/2.x/itop-portal-base/portal/src/Helper/ContextManipulatorHelper.php
@@ -25,7 +25,7 @@ namespace Combodo\iTop\Portal\Helper;
 use BinaryExpression;
 use Combodo\iTop\Portal\Brick\BrickCollection;
 use CoreOqlMultipleResultsForbiddenException;
-use CoreUnexpectedValue;
+use CorePortalInvalidActionRuleException;
 use DBObject;
 use DBSearch;
 use DOMFormatException;
@@ -279,6 +279,7 @@ class ContextManipulatorHelper
 	 * @throws \Exception
 	 * @throws \CoreException
 	 * @throws \OQLException
+	 * @throws \CorePortalInvalidActionRuleException N°2555 if action_rule query return more than 1 result (we should only have 1 source object)
 	 */
 	public function PrepareObject(array $aData, DBObject &$oObject)
 	{
@@ -351,7 +352,7 @@ class ContextManipulatorHelper
 						// N°2555 : disallow searches without any condition
 						$sErrMsg = "Portal query was stopped: action_rule '$sId' searches for '$sSearchClass' without any condition is forbidden";
 						IssueLog::Error($sErrMsg);
-						throw new CoreUnexpectedValue($sErrMsg);
+						throw new CorePortalInvalidActionRuleException($sErrMsg);
 					}
 
 					// Checking for silos
@@ -372,7 +373,7 @@ class ContextManipulatorHelper
 						// N°2555 : disallow searches returning more than 1 result
 						$sErrMsg = "Portal query was stopped: action_rule '$sId' gives more than 1 '$sSearchClass' result";
 						IssueLog::Error($sErrMsg);
-						throw new CoreUnexpectedValue($sErrMsg);
+						throw new CorePortalInvalidActionRuleException($sErrMsg);
 					}
 					if ($oSourceObject === null)
 					{