diff --git a/database/migrations/2026_01_29_090000_fix_sales_scenario_checklists_unique_key.php b/database/migrations/2026_01_29_090000_fix_sales_scenario_checklists_unique_key.php
index fee45fd..75fb113 100644
--- a/database/migrations/2026_01_29_090000_fix_sales_scenario_checklists_unique_key.php
+++ b/database/migrations/2026_01_29_090000_fix_sales_scenario_checklists_unique_key.php
@@ -3,6 +3,7 @@
 use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Support\Facades\Schema;
+use Illuminate\Support\Facades\DB;
 
 return new class extends Migration
 {
@@ -11,19 +12,29 @@
      */
     public function up(): void
     {
+        // 기존 유니크 키가 존재하면 삭제
+        $indexes = DB::select("SHOW INDEX FROM sales_scenario_checklists WHERE Key_name = 'sales_scenario_unique'");
+        if (count($indexes) > 0) {
+            Schema::table('sales_scenario_checklists', function (Blueprint $table) {
+                $table->dropUnique('sales_scenario_unique');
+            });
+        }
+
+        // checkpoint_index를 nullable로 변경
         Schema::table('sales_scenario_checklists', function (Blueprint $table) {
-            // 기존 유니크 키 삭제
-            $table->dropUnique('sales_scenario_unique');
-
-            // checkpoint_index를 nullable로 변경
             $table->unsignedTinyInteger('checkpoint_index')->nullable()->change();
-
-            // 새 유니크 키 생성 (checkpoint_id 기반)
-            $table->unique(
-                ['tenant_id', 'scenario_type', 'step_id', 'checkpoint_id'],
-                'sales_scenario_checkpoint_unique'
-            );
         });
+
+        // 새 유니크 키가 존재하지 않으면 생성
+        $newIndexes = DB::select("SHOW INDEX FROM sales_scenario_checklists WHERE Key_name = 'sales_scenario_checkpoint_unique'");
+        if (count($newIndexes) === 0) {
+            Schema::table('sales_scenario_checklists', function (Blueprint $table) {
+                $table->unique(
+                    ['tenant_id', 'scenario_type', 'step_id', 'checkpoint_id'],
+                    'sales_scenario_checkpoint_unique'
+                );
+            });
+        }
     }
 
     /**
@@ -31,18 +42,28 @@ public function up(): void
      */
     public function down(): void
     {
+        // 새 유니크 키가 존재하면 삭제
+        $indexes = DB::select("SHOW INDEX FROM sales_scenario_checklists WHERE Key_name = 'sales_scenario_checkpoint_unique'");
+        if (count($indexes) > 0) {
+            Schema::table('sales_scenario_checklists', function (Blueprint $table) {
+                $table->dropUnique('sales_scenario_checkpoint_unique');
+            });
+        }
+
+        // checkpoint_index를 NOT NULL로 복원
         Schema::table('sales_scenario_checklists', function (Blueprint $table) {
-            // 새 유니크 키 삭제
-            $table->dropUnique('sales_scenario_checkpoint_unique');
-
-            // checkpoint_index를 NOT NULL로 복원
             $table->unsignedTinyInteger('checkpoint_index')->nullable(false)->change();
-
-            // 기존 유니크 키 복원
-            $table->unique(
-                ['tenant_id', 'user_id', 'step_id', 'checkpoint_index'],
-                'sales_scenario_unique'
-            );
         });
+
+        // 기존 유니크 키가 존재하지 않으면 복원
+        $oldIndexes = DB::select("SHOW INDEX FROM sales_scenario_checklists WHERE Key_name = 'sales_scenario_unique'");
+        if (count($oldIndexes) === 0) {
+            Schema::table('sales_scenario_checklists', function (Blueprint $table) {
+                $table->unique(
+                    ['tenant_id', 'user_id', 'step_id', 'checkpoint_index'],
+                    'sales_scenario_unique'
+                );
+            });
+        }
     }
 };