Make supplier_id nullable

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

database/migrations/2025_06_06_155058_make_supplier_id_nullable.php

@@ -0,0 +1,27 @@
+<?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('asset_maintenances', function (Blueprint $table) {
+            $table->integer('supplier_id')->nullable()->default(null)->change();
+        });
+
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        //
+    }
+};