We have two Directors, both salaried. The current payroll category of Salary does not have annual leave enabled & is fixed. How to change this, so leave is accrued ?

I created another payroll category named Salaried Employees which allows annual leave accrual.
However I cannot disable or turn off the payroll category of Salary ?

Just do not understand whay it is so difficult just to enable annual leave accrual ?

Any answers to this ? and or how to fix it correctly ?