Bills receivable renewed

MY QUERY IS

Self Balancing Ledgers : 

if in question Bills Receivable Renewed is given....

whether we have to pass 2 entries --->

1. Debtors  A/c            Dr

        To Bills Receivable

(being cancellation of old B/R on renewal)

2. Bills Receivable         A/c        Dr

        To Debtors

(being B/R renewed)

                OR

whether we have to pass only one entry as under

Bills Receivable         A/c        Dr

        To Debtors

(being B/R renewed)