[Fixed]-Multiple messages.error Django

approved = PDFStat.objects.filter(quote_num=order).values_list('sales_approved', flat=True)

This will return a values queryset e.g. [True,]. Comparing it to True will always return False.

Perhaps you want something like:

pdf_stat = PDFStat.objects.get(quote_num=order)
approved = pdf_stat.sales_approved

Note you may need extra code to handle the case when there are no rows or multiple rows that match the get().