Delimiting payroll Area

Dear Experts,

We are having 12 payroll Areas ( All are monthly) now, due to the management decision I have to reduce the pay roll area 03. how can i do this.

If i delete the payroll area , i think it will effect the history of the employees,

so how can i delimit the payroll area??? or what is the solution for this?

Thanks in Advance.

Manjula.A