How to save input form into 3 different table database?

I created a form that will be inserted into different tables: 1.sales_order 2.sales_order_item 3.sequence_sales_order, but the data cannot be saved to the database, and when using dump it gets stuck before DB::beginTransaction();

Here, my controller code :

public function storesalesorder(Request $request)
    {
        $request->validate([
            'sales_order_no'=>'required',
        ]);
        dd('Before Transaction');
        DB::beginTransaction();
        try {
            $salesorder = new SalesOrder;
            $salesorder->quotation_no = $request->quotation_no;
            $salesorder->sales_order_no = $request->sales_order_no;
            $salesorder->company_name = $request->company_name;
            $salesorder->name = $request->name;
            $salesorder->date = $request->date;
            $salesorder->kbli = $request->kbli;
            $salesorder->email = $request->email;
            $salesorder->telephone = $request->telephone;
            $salesorder->po_no = $request->po_no;
            $salesorder->address = $request->address;
            $salesorder->npwp = $request->npwp;
            $salesorder->tax_address = $request->tax_address;
            $salesorder->scope_of_work_no = $request->scope_of_work_no;
            $salesorder->reference_number = $request->reference_number;
            $salesorder->work_unit = $request->work_unit;
            $salesorder->fax = $request->fax;
            $salesorder->radio_information = $request->radio_information;
            $salesorder->confirmation = $request->confirmation;
            $salesorder->special_requirement = $request->special_requirement;
            $salesorder->delivery_statement = $request->delivery_statement;
            $salesorder->term_of_payment = $request->term_of_payment;
            $salesorder->dod = $request->dod;
            $salesorder->image = $request->image;
            $salesorder->sample_reference = $request->sample_reference;
            $salesorder->assy_type = $request->assy_type;
            $salesorder->qc_statement = $request->qc_statement;
            $salesorder->packing_type = $request->packing_type;
            $salesorder->tax = $request->tax;
            $salesorder->discount = $request->discount;
            $salesorder->discount_percent = $request->discount_percent;
            $salesorder->total_amount = $request->total_amount;
            $salesorder->down_of_payment = $request->down_of_payment;
            $salesorder->down_of_payment_percent = $request->down_of_payment_percent;
            $salesorder->shippingpoint = $request->shippingpoint;
            $salesorder->salesman = $request->salesman;
            $salesorder->save();

            $sales_order_no = DB::table('sales_order')->orderBy('sales_order_no', 'DESC')->select('sales_order_no')->first();
            $sales_order_no = $sales_order_no->sales_order_no;
            dd('Inside Transaction');
            // Simpan item
            foreach ($request->item as $key => $items) {
                $salesorderitem['item'] = $items;
                $salesorderitem['sales_order_no'] = $sales_order_no;
                $salesorderitem['item_description'] = $request->item_description[$key];
                $salesorderitem['qty'] = $request->qty[$key];
                $salesorderitem['unit'] = $request->unit[$key];
                $salesorderitem['unit_price'] = $request->unit_price[$key];
                $salesorderitem['item_discount'] = $request->item_discount[$key];
                $salesorderitem['item_tax'] = $request->item_tax[$key];
                $salesorderitem['no_order'] = $request->no_order[$key];
                $salesorderitem['spec'] = $request->spec[$key];
                $salesorderitem['amount'] = $request->amount[$key];
                $salesorderitem['item_kbli'] = $request->item_kbli[$key];
                $salesorderitem['shipped'] = $request->shipped[$key];
                $salesorderitem['dept'] = $request->dept[$key];
                $salesorderitem['no_quote'] = $request->no_quote[$key];

                SalesOrderItem::create($salesorderitem);
            }

            DB::commit();
            dd('After commit');
            return redirect()->route('activities.salesorder')->with('success', 'Sales Order Added');
        } catch (\Exception $e) {
            DB::rollBack();
            dd('After rollback');
            return redirect()->back();
        }
    }

sales_order model :

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Notifications\Notifiable;
use Laravel\Sanctum\HasApiTokens;

class SalesOrder extends Model
{
    use HasApiTokens, HasFactory, Notifiable;

    /**
     * The attributes that are mass assignable.
     *
     * @var array<int, string>
     */
    protected $fillable = [
        'quotation_no',
        'sales_order_no',
        'company_name',
        'name',
        'date',
        'kbli',
        'email',
        'telephone',
        'po_no',
        'address',
        'npwp',
        'tax_address',
        'scope_of_work_no',
        'reference_number',
        'work_unit',
        'fax',
        'radio_information',
        'confirmation',
        'special_requirement',
        'delivery_statement',
        'term_of_payment',
        'dod',
        'image',
        'sample_reference',
        'assy_type',
        'qc_statement',
        'packing_type',
        'discount',
        'discount_percent',
        'total_amount',
        'down_of_payment' ,
        'down_of_payment_percent',
        'shippingpoint',
        'salesman' ,
    ];
}

sales_order_item model:

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Notifications\Notifiable;
use Laravel\Sanctum\HasApiTokens;

class SalesOrderItem extends Model
{
    use HasApiTokens, HasFactory, Notifiable;
    /**
     * The attributes that are mass assignable.
     *
     * @var array<int, string>
     */
    protected $fillable = [
        'sales_order_no',
        'item',
        'item_description',
        'qty',
        'unit',
        'unit_price',
        'item_discount',
        'item_tax',
        'no_order',
        'spec',
        'amount',
        'item_kbli',
        'shipped',
        'dept',
        'no_quote',
    ];
}