Enterprise Compensation Management - Mass date change of IT 0759

We run ECC 5.0 SP45 (for HR)

We currently use the Enterprise Compensation Management (ECM) process for our Merit Increases and Bonus assignments.

This year, at the end of the process (meaning that everyone is in Approved status on IT 0759), Management decided to change the effective date of the Merit Increases.

Does anyone have a suggestion (other than create a bdc session) that would allow me to mass change the effective date of this particular comp. review item on IT 0759, without impacting the bonus review item?