I am in the process of customizing our system and have created a few invoices at DRAFT status that I'd now like to delete. When I open one and click Delete, I get the warning pop-up asking me to confirm that I'd like to delete the record. I select "yes," the record closes, and the transaction list refreshes.

The invoice I've just deleted still appears on the list. I manually refresh the list, and the invoice still appears. I've tried this several times on a few DRAFT customer invoice records today, with the same result. I was able to delete some yesterday, so I'm not sure what has changed. Do I need to delete all the line items on an invoice before I delete it? 

Thanks!
Deborah