diff --git a/pages/UI.php b/pages/UI.php
index 110a07acf..2a664d567 100644
--- a/pages/UI.php
+++ b/pages/UI.php
@@ -1575,11 +1575,17 @@ EOF
 					if (!$bApplyStimulus)
 					{
 						$sMessage = Dict::S('UI:FailedToApplyStimuli');
-						$sSeverity = 'error';								
+						$sSeverity = 'error';
+
+						$sOwnershipToken = utils::ReadPostedParam('ownership_token', null, 'raw_data');
+						if ($sOwnershipToken !== null)
+						{
+							// Release the concurrent lock, if any
+							iTopOwnershipLock::ReleaseLock(get_class($oObj), $oObj->GetKey(), $sOwnershipToken);
+						}
 					}
 					else if ($sIssues != '')
 					{
-						
 						$sOwnershipToken = utils::ReadPostedParam('ownership_token', null, 'raw_data');
 						if ($sOwnershipToken !== null)
 						{