Need to transfer timesheet hours with out affecting progress reporter

Hi Team,

We have a specific requirement from users saying that

He has filled 10 hours for a proj X through progress reporter.

Now he wants to move some of hours suppose 6 hrs from proj X to Proj Y with out rejecting the timesheets or re entering the hours from progress reporter.

Can anyone help me out for this issue, user cannot reject timesheets or as he is referring to 6 months hours data filled by bunch of resources.

So is there any possibilities from backend to do this.

Appreciate your help,

Thanks & Regards,

Naveen B