GST E WAY BILL

Good afternoon every one

one of my Clint sale bill is prepared for the month of november-2020, at the time the material is not send the customer, he is accepted in the bill, but know he is send the material for the month of jan-2021, and e way bill is generated or not

e way bill is generated is any problem, please clarified my problem

note: gst sale bill is filed for the of december-2020

Thanking you