Canceled invoice and eway bill?

Hello everyone,
Recently we supplied goods to a party but by mistake the buyer quoted name of other company (say Co. B rather than Co. A) and we made invoice and EWay bill accordingly and goods have already been received by buyer. Buyer has already cancelled Eway bill
Now he is asking us to generate a new invoice with Co. A name on it.
Question
1 Should we issue new bill if yes then what points should be kept in mind
2 What about Eway bill now