diff --git a/core/userrights.class.inc.php b/core/userrights.class.inc.php
index 23151b2080..aeea4fa20c 100644
--- a/core/userrights.class.inc.php
+++ b/core/userrights.class.inc.php
@@ -1962,6 +1962,15 @@ class UserRights
 		return self::$m_aCacheUsers[$sAuthentication][$sLogin];
 	}
 
+	/**
+	 * Reset the cache of users
+	 * @return void
+	 */
+	public static function ResetCacheUsers()
+	{
+		self::$m_aCacheUsers = [ 'internal' => [], 'external' => [] ];
+	}
+	
 	/**
 	 * @param string$sClass
 	 * @param array $aAllowedOrgs