diff --git a/database/migrations/2025_12_06_123957_drop_unique_plant_operation_from_work_group_masters.php b/database/migrations/2025_12_06_123957_drop_unique_plant_operation_from_work_group_masters.php
new file mode 100644
index 0000000..4401e81
--- /dev/null
+++ b/database/migrations/2025_12_06_123957_drop_unique_plant_operation_from_work_group_masters.php
@@ -0,0 +1,35 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('work_group_masters', function (Blueprint $table) {
+            $table->dropUnique('work_group_masters_plant_id_operation_number_key');
+        });
+
+        // $sql = <<<'SQL'
+        // ALTER TABLE work_group_masters
+        // DROP INDEX work_group_masters_plant_id_operation_number_key;
+        // SQL;
+
+        // DB::statement($sql);
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('work_group_masters', function (Blueprint $table) {
+            //
+        });
+    }
+};