fix(clone): do not copy preview records when an application is cloned

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -18,6 +18,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 
 ### Fixed
 
+- Do not copy the preview deployments of an application when you clone it. A clone of an application with a fixed preview URL template (for example `demo-mr-{{pr_id}}.example.com`) failed with a duplicate preview domain error and left a stopped, partial clone. The clone gets its own previews from new pull requests
 - Handle an existing Cloudflare DNS record with a different IP when Coolify adds the DNS record of a new domain automatically. Coolify now replaces the record when it created the record and no other resource uses it. Otherwise it opens the **Configure DNS** dialog, where you can replace the record, and the domain shows the conflict instead of "Not checked"
 - Add the Cloudflare DNS record automatically, or open the **Configure DNS** dialog, also when you edit a domain to a hostname in a connected Cloudflare zone, for example when you change a generated domain to your own domain. Before, Coolify did this only when you added a new domain. This applies to the **Domains** pages, the application and service application settings, and the service application API
 - Save deployments started through the MCP server as MCP deployments, not as API deployments. The deployment list shows them with the **MCP** source and filter, and the API and MCP deployment data have a new `is_mcp` field. The deployments to additional servers keep the source of the main deployment, and the audit log records actions that MCP tools do through the API as MCP events

bootstrap/helpers/applications.php

@@ -513,29 +513,7 @@ function clone_application(Application $source, $destination, array $overrides =
         $newTask->save();
     }
 
-    // Clone previews with FQDN regeneration
-    $applicationPreviews = $source->previews()->get();
-    foreach ($applicationPreviews as $preview) {
-        $newPreview = $preview->replicate([
-            'id',
-            'created_at',
-            'updated_at',
-        ])->fill([
-            'uuid' => new_public_id(),
-            'application_id' => $newApplication->id,
-            'status' => 'exited',
-            'fqdn' => null,
-            'docker_compose_domains' => null,
-        ]);
-        $newPreview->save();
-
-        // Regenerate FQDN for the cloned preview
-        if ($newApplication->build_pack === 'dockercompose') {
-            $newPreview->generate_preview_fqdn_compose();
-        } else {
-            $newPreview->generate_preview_fqdn();
-        }
-    }
+    // Preview records belong to the pull request deployments of the source. The clone gets its own on the next pull request.
 
     // Clone persistent volumes
     $pendingVolumeClones = [];