Laravel 12 + rappasoft package using pivot data

I have the following data model(equipment rental):

order(id,client_id,status), equipment(id, title, rental_price, status, category_id). equipment_unit(id, equipment_id, code) order_items(order_id, equipment_unit_id, rented_at, due_at, rental_price)

Relation: Order

public function firstItem()
{
    return $this->hasOne(OrderItem::class)->oldestOfMany();
}

public function getFirstItemAttribute()
{
    return $this->firstItem()->first();
}


public function client()
{
    return $this->belongsTo(Client::class, 'client_id');
}

public function items()
{
    return $this->hasMany(OrderItem::class);
}

//Relation OrderItem
public function order()
{
    return $this->belongsTo(Order::class);
}

public function equipmentUnit()
{
    return $this->belongsTo(EquipmentUnit::class);
}

public function equipmentModel()
{
    return $this->hasOneThrough(
        EquipmentModel::class,
        EquipmentUnit::class,
        'id',                // Foreign key on equipment_units
        'id',                // Foreign key on equipment_models
        'equipment_unit_id', // Local key on order_items
        'model_id' // Local key on equipment_units
    );
}

//Relation EquimentUnit
public function model()
{
    return $this->belongsTo(EquipmentModel::class, 'equipment_model_id');
}

public function equipment()
{
    return $this->belongsTo(EquipmentModel::class, 'model_id');
}

public function orders()
{
    return $this->hasMany(Order::class, 'equipment_unit_id');
}

I need to output information to a table with order_items.Field rented_at and due_at.I'm outputting but unfortunately there are duplicates, I just need to take first item.

public function columns(): array
{
    return [
        Column::make('ID', 'id')->sortable()->searchable(),
        DateColumn::make('Rental date', 'firstItem.rented_at')
            ->inputFormat('Y-m-d H:i:s') 
            ->outputFormat('d.m.Y')
            ->sortable(),
        Column::make('Client', 'client.name')->searchable(),
        Column::make('Phone', 'client.phone')->searchable(),
        Column::make('Equipment','equipment')
            ->label(function ($row) {
                return $row->items
                    ->map(function ($item) {
                        return $item->equipmentUnit->equipment->title
                            . ' (' . $item->equipmentUnit->code . ')';
                    })
                    ->implode('<br>');
            })
            ->html(),

        Column::make('Action')
            ->label(fn($row) => view('livewire.orders.table-actions', ['id' => $row->id,
                'status' => $row->status]))->html(),

    ];
}