Override Hourly Rate - SQL update?

Hello,

We are trying to close a holiday leave plan and has loaded the adjustment hours on to the August monthly payline to clear out the balance hours for employees.

But as it is an 'hours only' earn code, and by doing a -ve adjustment, the payline shows a -ve amount. Though this doesn't impact the employee's pay, it might be alarming for them to view the -ve amount on their paycheck.

What are the options to not display the -ve amount to employees?

I have tried turning on the 'Override Hourly Rate' flag on the payline and then clearing out the hourly rate field and that worked, but considering the volume of employees it cannot be done manually.