diff --git a/database/migrations/2025_08_13_140921_add_foreign_and_unique_key_to_machines.php b/database/migrations/2025_08_13_140921_add_foreign_and_unique_key_to_machines.php
new file mode 100644
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+++ b/database/migrations/2025_08_13_140921_add_foreign_and_unique_key_to_machines.php
@@ -0,0 +1,40 @@
+<?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
+    {
+		$sql1 = <<<'SQL'
+            ALTER TABLE machines
+            ADD COLUMN work_group_master_id BIGINT NOT NULL,
+            ADD CONSTRAINT machines_work_group_master_id_fkey
+            FOREIGN KEY (work_group_master_id) REFERENCES work_group_masters(id);
+        SQL;
+
+        DB::statement($sql1);
+
+        $sql2 = <<<'SQL'
+        ALTER TABLE machines
+        ADD UNIQUE (plant_id, work_center);
+        SQL;
+
+        DB::statement($sql2);
+	}
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        // Schema::table('machines', function (Blueprint $table) {
+        //     //
+        // });
+    }
+};