Added migration to fix existing wonky data

Signed-off-by: snipe <snipe@snipe.net>

database/migrations/2025_06_03_053438_fix_assigned_type_without_assigned_to.php

@@ -0,0 +1,23 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        DB::table('assets')->whereNotNull('assigned_type')->whereNull('assigned_to')->update(['assigned_type' => null]);
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+
+    }
+};