diff --git a/src/Extension/MokoWaaS.php b/src/Extension/MokoWaaS.php
index 9be73669..9766490d 100644
--- a/src/Extension/MokoWaaS.php
+++ b/src/Extension/MokoWaaS.php
@@ -2711,8 +2711,9 @@ class MokoWaaS extends CMSPlugin
 	/**
 	 * Send heartbeat to the MokoWaaS monitoring receiver.
 	 *
-	 * Registers this site (and any aliases) with the Grafana provisioning system.
+	 * Registers this site's primary domain with the Grafana provisioning system.
 	 * The receiver writes a datasource YAML file and restarts Grafana.
+	 * Alias domains are not registered to avoid duplicate datasource UIDs.
 	 *
 	 * @param   \Joomla\Registry\Registry                $params  Plugin params
 	 * @param   \Joomla\CMS\Application\CMSApplication   $app     Application
@@ -2733,35 +2734,8 @@ class MokoWaaS extends CMSPlugin
 		$siteUrl  = rtrim(Uri::root(), '/');
 		$siteName = Factory::getConfig()->get('sitename', 'Joomla');
 
-		// Register primary domain
+		// Register primary domain only — aliases should not get separate datasources
 		$this->sendHeartbeat($siteUrl, $siteName, $healthToken, $app);
-
-		// Register any alias domains (subform format: array of objects with domain key)
-		$aliases = $params->get('site_aliases', '');
-
-		if (!empty($aliases))
-		{
-			if (is_string($aliases))
-			{
-				$aliases = json_decode($aliases, false);
-			}
-
-			if (is_array($aliases))
-			{
-				foreach ($aliases as $alias)
-				{
-					$alias = (object) $alias;
-
-					if (!empty($alias->domain))
-					{
-						$domain   = trim($alias->domain);
-						$aliasUrl = 'https://' . preg_replace('#^https?://#i', '', $domain);
-						$aliasUrl = rtrim($aliasUrl, '/');
-						$this->sendHeartbeat($aliasUrl, $siteName, $healthToken, $app);
-					}
-				}
-			}
-		}
 	}
 
 	/**