Delete a duplicate pay

A client called saying he was having internet issues when processing his weekly wages, and recorded zero hours for an employee in error.

He created a new pay period but instead of just paying the missing employee, he paid the others again as well.

The physical payment to staff is fine, but we would like to remove the incorrect pay information from his records.  I know how to do this in myIR but how can we correct this in MYOB?

Thanks

Dianne