Rebate relevance and Billing index recompilation

Hello

I am in the process of building the configuration for the system, particularly rebates.

Initially the sales org was marked for rebate relevance, later unchecked and now checked once again.

No rebate agreements have been created in system.

3 billing documents have been created (belonging to billing type not relevant for rebates) which have not passed to accounting.

Do I need to run the billing index program under the above circumstance ?

Thanks and Best Regards

cds