diff --git a/database/migrations/2026_02_16_100950_add_foreign_key_machine_id_to_production_quantities.php b/database/migrations/2026_02_16_100950_add_foreign_key_machine_id_to_production_quantities.php
new file mode 100644
index 0000000..a3fbb57
--- /dev/null
+++ b/database/migrations/2026_02_16_100950_add_foreign_key_machine_id_to_production_quantities.php
@@ -0,0 +1,33 @@
+<?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
+    {
+        $sql = <<<'SQL'
+            ALTER TABLE production_quantities
+            ADD COLUMN machine_id BIGINT DEFAULT NULL,
+            ADD CONSTRAINT production_quantities_machine_id_fkey
+            FOREIGN KEY (machine_id) REFERENCES machines(id);
+        SQL;
+
+        DB::statement($sql);
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        // Schema::table('production_quantities', function (Blueprint $table) {
+        //     //
+        // });
+    }
+};