diff --git a/app/Models/Boards/Post.php b/app/Models/Boards/Post.php
index 07778bb..ddadd9a 100644
--- a/app/Models/Boards/Post.php
+++ b/app/Models/Boards/Post.php
@@ -4,6 +4,7 @@
 
 use App\Models\Commons\File;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
 use Illuminate\Database\Eloquent\SoftDeletes;
 
 /**
@@ -20,9 +21,15 @@ class Post extends Model
         'ip_address', 'is_notice', 'is_secret', 'views', 'status',
     ];
 
-    public function files()
+    /**
+     * 게시글 첨부파일 (document_type/document_id 기반)
+     * - 시스템 게시판의 경우 tenant 무관하게 조회해야 하므로 TenantScope 제외
+     */
+    public function files(): HasMany
     {
-        return $this->morphMany(File::class, 'fileable');
+        return $this->hasMany(File::class, 'document_id')
+            ->where('document_type', 'post')
+            ->withoutGlobalScope(\App\Models\Scopes\TenantScope::class);
     }
 
     public function comments()
diff --git a/app/Providers/AppServiceProvider.php b/app/Providers/AppServiceProvider.php
index c7be328..755c030 100644
--- a/app/Providers/AppServiceProvider.php
+++ b/app/Providers/AppServiceProvider.php
@@ -2,6 +2,7 @@
 
 namespace App\Providers;
 
+use App\Models\Boards\Post;
 use App\Models\Commons\Menu;
 use App\Models\Members\User;
 use App\Models\Tenants\Tenant;
@@ -33,9 +34,10 @@ public function register(): void
      */
     public function boot(): void
     {
-        // Morph Map: mng/api 프로젝트 간 User 모델 경로 통일
+        // Morph Map: 다형성 관계 모델 등록 (enforceMorphMap 사용 시 필수)
         Relation::enforceMorphMap([
             'user' => User::class,
+            'post' => Post::class,
         ]);
 
         // DB::enableQueryLog();