diff --git a/app/Http/Controllers/Api/ApplicationsController.php b/app/Http/Controllers/Api/ApplicationsController.php
index 8c44a54740..6815cde88b 100644
--- a/app/Http/Controllers/Api/ApplicationsController.php
+++ b/app/Http/Controllers/Api/ApplicationsController.php
@@ -433,7 +433,7 @@ class ApplicationsController extends Controller
                             'http_basic_auth_argon2id_time_cost' => ['type' => 'integer', 'minimum' => 1, 'maximum' => 12, 'default' => 4, 'description' => 'Argon2id time cost (iterations) for the HTTP Basic Authentication password.'],
                             'connect_to_docker_network' => ['type' => 'boolean', 'description' => 'The flag to connect the service to the predefined Docker network.'],
                             'force_domain_override' => ['type' => 'boolean', 'description' => 'Force domain usage even if conflicts are detected. Default is false.'],
-                            'autogenerate_domain' => ['type' => 'boolean', 'default' => true, 'description' => 'If true and domains is empty, auto-generate a domain using the server\'s wildcard domain or sslip.io fallback. Default: true.'],
+                            'autogenerate_domain' => ['type' => 'boolean', 'default' => true, 'description' => 'If true and domains is empty, auto-generate a domain using the server\'s wildcard domain or sslip.io fallback. Ignored for the dockercompose build pack, which uses docker_compose_domains. Default: true.'],
                             'is_container_label_escape_enabled' => ['type' => 'boolean', 'default' => true, 'description' => 'Escape special characters in labels. By default, $ (and other chars) is escaped. So if you write $ in the labels, it will be saved as $$. If you want to use env variables inside the labels, turn this off.'],
                             'tags' => ['type' => 'array', 'items' => new OA\Items(type: 'string'), 'description' => 'Tags to assign to the application.'],
                             'is_preserve_repository_enabled' => ['type' => 'boolean', 'default' => false, 'description' => 'Preserve repository during deployment.'],
@@ -632,7 +632,7 @@ class ApplicationsController extends Controller
                             'http_basic_auth_argon2id_time_cost' => ['type' => 'integer', 'minimum' => 1, 'maximum' => 12, 'default' => 4, 'description' => 'Argon2id time cost (iterations) for the HTTP Basic Authentication password.'],
                             'connect_to_docker_network' => ['type' => 'boolean', 'description' => 'The flag to connect the service to the predefined Docker network.'],
                             'force_domain_override' => ['type' => 'boolean', 'description' => 'Force domain usage even if conflicts are detected. Default is false.'],
-                            'autogenerate_domain' => ['type' => 'boolean', 'default' => true, 'description' => 'If true and domains is empty, auto-generate a domain using the server\'s wildcard domain or sslip.io fallback. Default: true.'],
+                            'autogenerate_domain' => ['type' => 'boolean', 'default' => true, 'description' => 'If true and domains is empty, auto-generate a domain using the server\'s wildcard domain or sslip.io fallback. Ignored for the dockercompose build pack, which uses docker_compose_domains. Default: true.'],
                             'is_container_label_escape_enabled' => ['type' => 'boolean', 'default' => true, 'description' => 'Escape special characters in labels. By default, $ (and other chars) is escaped. So if you write $ in the labels, it will be saved as $$. If you want to use env variables inside the labels, turn this off.'],
                             'tags' => ['type' => 'array', 'items' => new OA\Items(type: 'string'), 'description' => 'Tags to assign to the application.'],
                             'is_preserve_repository_enabled' => ['type' => 'boolean', 'default' => false, 'description' => 'Preserve repository during deployment.'],
@@ -831,7 +831,7 @@ class ApplicationsController extends Controller
                             'http_basic_auth_argon2id_time_cost' => ['type' => 'integer', 'minimum' => 1, 'maximum' => 12, 'default' => 4, 'description' => 'Argon2id time cost (iterations) for the HTTP Basic Authentication password.'],
                             'connect_to_docker_network' => ['type' => 'boolean', 'description' => 'The flag to connect the service to the predefined Docker network.'],
                             'force_domain_override' => ['type' => 'boolean', 'description' => 'Force domain usage even if conflicts are detected. Default is false.'],
-                            'autogenerate_domain' => ['type' => 'boolean', 'default' => true, 'description' => 'If true and domains is empty, auto-generate a domain using the server\'s wildcard domain or sslip.io fallback. Default: true.'],
+                            'autogenerate_domain' => ['type' => 'boolean', 'default' => true, 'description' => 'If true and domains is empty, auto-generate a domain using the server\'s wildcard domain or sslip.io fallback. Ignored for the dockercompose build pack, which uses docker_compose_domains. Default: true.'],
                             'is_container_label_escape_enabled' => ['type' => 'boolean', 'default' => true, 'description' => 'Escape special characters in labels. By default, $ (and other chars) is escaped. So if you write $ in the labels, it will be saved as $$. If you want to use env variables inside the labels, turn this off.'],
                             'tags' => ['type' => 'array', 'items' => new OA\Items(type: 'string'), 'description' => 'Tags to assign to the application.'],
                             'is_preserve_repository_enabled' => ['type' => 'boolean', 'default' => false, 'description' => 'Preserve repository during deployment.'],
@@ -1001,7 +1001,7 @@ class ApplicationsController extends Controller
                             'http_basic_auth_argon2id_time_cost' => ['type' => 'integer', 'minimum' => 1, 'maximum' => 12, 'default' => 4, 'description' => 'Argon2id time cost (iterations) for the HTTP Basic Authentication password.'],
                             'connect_to_docker_network' => ['type' => 'boolean', 'description' => 'The flag to connect the service to the predefined Docker network.'],
                             'force_domain_override' => ['type' => 'boolean', 'description' => 'Force domain usage even if conflicts are detected. Default is false.'],
-                            'autogenerate_domain' => ['type' => 'boolean', 'default' => true, 'description' => 'If true and domains is empty, auto-generate a domain using the server\'s wildcard domain or sslip.io fallback. Default: true.'],
+                            'autogenerate_domain' => ['type' => 'boolean', 'default' => true, 'description' => 'If true and domains is empty, auto-generate a domain using the server\'s wildcard domain or sslip.io fallback. Ignored for the dockercompose build pack, which uses docker_compose_domains. Default: true.'],
                             'is_container_label_escape_enabled' => ['type' => 'boolean', 'default' => true, 'description' => 'Escape special characters in labels. By default, $ (and other chars) is escaped. So if you write $ in the labels, it will be saved as $$. If you want to use env variables inside the labels, turn this off.'],
                             'tags' => ['type' => 'array', 'items' => new OA\Items(type: 'string'), 'description' => 'Tags to assign to the application.'],
                         ],
@@ -1167,7 +1167,7 @@ class ApplicationsController extends Controller
                             'http_basic_auth_argon2id_time_cost' => ['type' => 'integer', 'minimum' => 1, 'maximum' => 12, 'default' => 4, 'description' => 'Argon2id time cost (iterations) for the HTTP Basic Authentication password.'],
                             'connect_to_docker_network' => ['type' => 'boolean', 'description' => 'The flag to connect the service to the predefined Docker network.'],
                             'force_domain_override' => ['type' => 'boolean', 'description' => 'Force domain usage even if conflicts are detected. Default is false.'],
-                            'autogenerate_domain' => ['type' => 'boolean', 'default' => true, 'description' => 'If true and domains is empty, auto-generate a domain using the server\'s wildcard domain or sslip.io fallback. Default: true.'],
+                            'autogenerate_domain' => ['type' => 'boolean', 'default' => true, 'description' => 'If true and domains is empty, auto-generate a domain using the server\'s wildcard domain or sslip.io fallback. Ignored for the dockercompose build pack, which uses docker_compose_domains. Default: true.'],
                             'is_container_label_escape_enabled' => ['type' => 'boolean', 'default' => true, 'description' => 'Escape special characters in labels. By default, $ (and other chars) is escaped. So if you write $ in the labels, it will be saved as $$. If you want to use env variables inside the labels, turn this off.'],
                             'tags' => ['type' => 'array', 'items' => new OA\Items(type: 'string'), 'description' => 'Tags to assign to the application.'],
                         ],
@@ -1319,7 +1319,8 @@ class ApplicationsController extends Controller
             $fqdn = ValidationPatterns::normalizeApplicationDomains($request->domains);
             $request->offsetSet('domains', $fqdn);
         }
-        $autogenerateDomain = $request->boolean('autogenerate_domain', true);
+        // A Docker Compose application uses per-service domains; a top-level domain is never routed.
+        $autogenerateDomain = $request->boolean('autogenerate_domain', true) && $request->build_pack !== 'dockercompose';
         $instantDeploy = $request->instant_deploy;
         $githubAppUuid = $request->github_app_uuid;
         $useBuildServer = $request->use_build_server;
diff --git a/app/Http/Controllers/Api/DatabasesController.php b/app/Http/Controllers/Api/DatabasesController.php
index 84486f6a9f..aa646abe32 100644
--- a/app/Http/Controllers/Api/DatabasesController.php
+++ b/app/Http/Controllers/Api/DatabasesController.php
@@ -3364,6 +3364,10 @@ class DatabasesController extends Controller
                 response: 409,
                 description: 'Another start, restart or import of this database is already in progress.',
             ),
+            new OA\Response(
+                response: 422,
+                description: 'The database cannot start yet, for example because a CA certificate is missing.',
+            ),
         ]
     )]
     public function action_deploy(Request $request)
@@ -3386,6 +3390,10 @@ class DatabasesController extends Controller
         if (str($database->status)->contains('running')) {
             return response()->json(['message' => 'Database is already running.'], 400);
         }
+        $prerequisiteError = StartDatabase::prerequisiteError($database);
+        if ($prerequisiteError !== null) {
+            return response()->json(['message' => $prerequisiteError], 422);
+        }
         $reservation = StartDatabase::reserveOperation($database);
         if ($reservation === null) {
             return response()->json(['message' => ResourceStartActivity::DATABASE_OPERATION_IN_PROGRESS_MESSAGE], 409);
@@ -3558,6 +3566,10 @@ class DatabasesController extends Controller
                 response: 409,
                 description: 'Another start, restart or import of this database is already in progress.',
             ),
+            new OA\Response(
+                response: 422,
+                description: 'The database cannot start yet, for example because a CA certificate is missing.',
+            ),
         ]
     )]
     public function action_restart(Request $request)
@@ -3577,6 +3589,10 @@ class DatabasesController extends Controller
 
         $this->authorize('manage', $database);
 
+        $prerequisiteError = StartDatabase::prerequisiteError($database);
+        if ($prerequisiteError !== null) {
+            return response()->json(['message' => $prerequisiteError], 422);
+        }
         $reservation = StartDatabase::reserveOperation($database);
         if ($reservation === null) {
             return response()->json(['message' => ResourceStartActivity::DATABASE_OPERATION_IN_PROGRESS_MESSAGE], 409);
diff --git a/app/Http/Controllers/Api/DeployController.php b/app/Http/Controllers/Api/DeployController.php
index b58a72d6ff..e5aac43b85 100644
--- a/app/Http/Controllers/Api/DeployController.php
+++ b/app/Http/Controllers/Api/DeployController.php
@@ -559,6 +559,11 @@ class DeployController extends Controller
                 } catch (AuthorizationException $e) {
                     return ['message' => 'Unauthorized to start this database.', 'deployment_uuid' => null];
                 }
+                $prerequisiteError = StartDatabase::prerequisiteError($resource);
+                if ($prerequisiteError !== null) {
+                    $message = $prerequisiteError;
+                    break;
+                }
                 $reservation = StartDatabase::reserveOperation($resource);
                 if ($reservation === null) {
                     $message = ResourceStartActivity::DATABASE_OPERATION_IN_PROGRESS_MESSAGE;
diff --git a/app/Livewire/Project/Database/Heading.php b/app/Livewire/Project/Database/Heading.php
index a7e8cfedd8..af6f7405e0 100644
--- a/app/Livewire/Project/Database/Heading.php
+++ b/app/Livewire/Project/Database/Heading.php
@@ -158,6 +158,7 @@ class Heading extends Component
                 return;
             }
             $this->auditDatabaseAction('ui.database.restarted');
+            $this->dispatch('info', 'Restarting database.');
             $this->markDeploymentRunning($activity);
             $this->js("window.dispatchEvent(new CustomEvent('startdatabase'))");
             $this->dispatch('activityMonitor', $activity->id, ServiceStatusChanged::class);
diff --git a/app/Mcp/Tools/Control.php b/app/Mcp/Tools/Control.php
index aca6b46564..65ec7ca4c1 100644
--- a/app/Mcp/Tools/Control.php
+++ b/app/Mcp/Tools/Control.php
@@ -141,6 +141,11 @@ class Control extends Tool
             return ['message' => 'Database is already running.'];
         }
 
+        $prerequisiteError = StartDatabase::prerequisiteError($database);
+        if ($prerequisiteError !== null) {
+            throw new \RuntimeException($prerequisiteError);
+        }
+
         $reservation = StartDatabase::reserveOperation($database);
         if ($reservation === null) {
             throw new \RuntimeException(ResourceStartActivity::DATABASE_OPERATION_IN_PROGRESS_MESSAGE);
diff --git a/resources/views/livewire/project/database/heading.blade.php b/resources/views/livewire/project/database/heading.blade.php
index abf58177c7..eec4add287 100644
--- a/resources/views/livewire/project/database/heading.blade.php
+++ b/resources/views/livewire/project/database/heading.blade.php
@@ -183,7 +183,7 @@
                     window.dispatchEvent(new CustomEvent('database-action-finished'));
                     return;
                 }
-                window.dispatchEvent(new CustomEvent('startdatabase'));
+                // start() opens the log dialog only when the start was queued.
                 try {
                     await $wire.$call('start');
                 } finally {
@@ -197,8 +197,7 @@
                     return;
                 }
                 window.dispatchEvent(new CustomEvent('database-busy'));
-                $wire.$dispatch('info', 'Restarting database.');
-                window.dispatchEvent(new CustomEvent('startdatabase'));
+                // restart() opens the log dialog only when the restart was queued.
                 try {
                     await $wire.$call('restart');
                 } finally {
diff --git a/tests/Feature/ApplicationComposeInjectionValidationTest.php b/tests/Feature/ApplicationComposeInjectionValidationTest.php
index 4db2d25dad..3af9f50506 100644
--- a/tests/Feature/ApplicationComposeInjectionValidationTest.php
+++ b/tests/Feature/ApplicationComposeInjectionValidationTest.php
@@ -266,6 +266,26 @@ test('API create accepts a safe docker_compose_raw', function () {
         ->assertCreated();
 });
 
+test('API create does not generate a domain for a docker compose application', function () {
+    Queue::fake();
+
+    $response = $this->withHeaders(['Authorization' => 'Bearer '.$this->token])
+        ->postJson('/api/v1/applications/public', [
+            'project_uuid' => $this->project->uuid,
+            'environment_uuid' => $this->environment->uuid,
+            'server_uuid' => $this->server->uuid,
+            'git_repository' => 'https://gitlab.com/coolify/compose-app',
+            'git_branch' => 'main',
+            'build_pack' => 'dockercompose',
+            'ports_exposes' => '80',
+            'autogenerate_domain' => true,
+            'docker_compose_raw' => SAFE_APPLICATION_COMPOSE,
+        ])
+        ->assertCreated();
+
+    expect(Application::query()->where('uuid', $response->json('uuid'))->value('fqdn'))->toBeNull();
+});
+
 test('API update does not accept docker_compose_raw', function () {
     $this->withHeaders(['Authorization' => 'Bearer '.$this->token])
         ->patchJson("/api/v1/applications/{$this->application->uuid}", [
diff --git a/tests/Feature/ApplicationPublicApiGitRepositoryTest.php b/tests/Feature/ApplicationPublicApiGitRepositoryTest.php
index eb105e6764..00f41b2a6e 100644
--- a/tests/Feature/ApplicationPublicApiGitRepositoryTest.php
+++ b/tests/Feature/ApplicationPublicApiGitRepositoryTest.php
@@ -86,3 +86,9 @@ test('public github repositories are stored as owner and repository with the pub
         ->and($application->source_type)->toBe(GithubApp::class)
         ->and($application->source_id)->toBe(0);
 });
+
+test('a public application gets a generated domain by default', function () {
+    $application = createPublicGitApplication(['autogenerate_domain' => true]);
+
+    expect($application->fqdn)->not->toBeEmpty();
+});
diff --git a/tests/Feature/StartClickhouseVolumesTest.php b/tests/Feature/StartClickhouseVolumesTest.php
index faa13a0944..8193cdb95e 100644
--- a/tests/Feature/StartClickhouseVolumesTest.php
+++ b/tests/Feature/StartClickhouseVolumesTest.php
@@ -19,6 +19,7 @@ use App\Models\User;
 use Illuminate\Foundation\Testing\RefreshDatabase;
 use Illuminate\Support\Facades\Process;
 use Illuminate\Support\Facades\Queue;
+use Illuminate\Support\Str;
 use Livewire\Livewire;
 use Spatie\Activitylog\Models\Activity;
 use Symfony\Component\Yaml\Yaml;
@@ -174,3 +175,43 @@ it('reads the data mount with sudo on a non-root server', function () {
     expect($database->fresh()->anonymousDataVolume())->toBe('3f1c0ffee')
         ->and(ranRemoteCommandContaining("sudo docker inspect --format '{{range .Mounts}}{{if eq .Destination \"/var/lib/clickhouse\"}}{{.Type}} {{.Name}}{{end}}{{end}}' '{$database->uuid}' 2>/dev/null || sudo true"))->toBeTrue();
 });
+
+it('rejects an API start or restart of a blocked database at once', function (string $method, string $path) {
+    $database = create_standalone_clickhouse($this->environment->id, $this->destination);
+    fakeClickhouseDataMount('3f1c0ffee');
+    $plainToken = Str::random(40);
+    $token = $this->owner->tokens()->create([
+        'name' => 'clickhouse-test',
+        'token' => hash('sha256', $plainToken),
+        'abilities' => ['*'],
+        'team_id' => $this->team->id,
+    ]);
+
+    $response = $this->withHeader('Authorization', 'Bearer '.$token->getKey().'|'.$plainToken)
+        ->json($method, str_replace('{uuid}', $database->uuid, $path));
+
+    $response->assertStatus(422);
+    expect($response->json('message'))->toContain('unnamed Docker volume 3f1c0ffee');
+    Queue::assertNothingPushed();
+})->with([
+    'start' => ['POST', '/api/v1/databases/{uuid}/start'],
+    'restart' => ['POST', '/api/v1/databases/{uuid}/restart'],
+]);
+
+it('reports a blocked database in the deploy API', function () {
+    $database = create_standalone_clickhouse($this->environment->id, $this->destination);
+    fakeClickhouseDataMount('3f1c0ffee');
+    $plainToken = Str::random(40);
+    $token = $this->owner->tokens()->create([
+        'name' => 'clickhouse-test',
+        'token' => hash('sha256', $plainToken),
+        'abilities' => ['*'],
+        'team_id' => $this->team->id,
+    ]);
+
+    $response = $this->withHeader('Authorization', 'Bearer '.$token->getKey().'|'.$plainToken)
+        ->postJson('/api/v1/deploy', ['uuid' => $database->uuid]);
+
+    expect($response->json('deployments.0.message'))->toContain('unnamed Docker volume 3f1c0ffee');
+    Queue::assertNothingPushed();
+});