Array to string conversion error after form submission

[DevMushref]

Note: using media library pro.

I have a service class with storeReport() method

public function storeReport(Request $request)
    {
        $report = new Report();
        $report
            ->fill($request->validated())
            ->syncFromMediaLibraryRequest($request->attachment)
            ->toMediaCollection('attachment');

        $report->save();

        if(!$report) {
            throw new ReportException('Something went wrong with the request.' . $report);
        }

        return $report;
    }

The $request->validated() is basically submitting only the validated fields in the request, part of the request is the attachment:

'attachment'  => $this->validateMultipleMedia()
->minItems(1)
->maxItems(10)
->extension(['png', 'jpg', 'jpeg', 'gif', 'webp'])
->maxItemSizeInKb(5000)
->attribute('name', 'required'),

I made sure to include use ValidatesMedia; before the rules() array.

Then I call the service class in the controller:

public function store(ReportsRequest $request, ReportService $reportService)
    {
        try
        {
            dd($request, $reportService);
            $reportService->storeReport($request);
            return redirect('data-entry/reports')->with('success', 'Report Added Successfully');
        }
        catch (ImageUploadException $exception)
        {

        }
        catch (ReportException $exception)
        {

        }
    }

Sometimes when I refresh, or try to submit the form, I get another error saying Invalid UUID

Here is a screenshot of the request being sent:

What's actually going on here?