FI Posting Reverse for one wage type

Dear Team,

One of my clients processes the payroll for the month of August 2014 & completed the FI posting successfully.

Suppose Client is used the salary component for the month of August 2014:-Basic / HRA / Conv./ Special Allow & PI (performance incentive).

PI is not a regular component its one-time payment, paid on annual through infotype 0015.

Now client wants to one wage type posting revert (PI posting reverse),

So how can we reverse one wage type posting?

Thank you in advance.

Regards,

Rakesh