how to delete an invoice ?

Dear All

I have created an invoice by mistake and want to delete it after saving it.

I tried to click on Actions -> Delete invoice = This action isn't applicable for the invoice in its current state

I thought maybe i should validate and appprove

once validated again Action -> Delete Invoice = This action isn't applicable for the invoice in its current state

then Action -> Cancel invoice = Cancelled ten Action ->Delete invoice = This action isn't applicable for the invoice in its current state

Any ideas how I can delete the invoice ?

Thank you

Regards