Could it be that the delete transaction can only be done if you still have BTC in you wallet?
I get 0 for now.
Silly question to ask... it's impossible to make any transaction in bitcoin blockchain if you have ZER0 coins in your wallet, and zero really needs to be 0, not 0.00012 or similar.
You can't get in negative balance with bitcoin, like you can do with fiat currencies and banks accounts.