Encumbrance Journals in Standard Accrual SLA Ledger

Hi,

After creating a new secondary ledger in subledger level of mapping with Standard Accrual SLA Method.

"The SLA Method of Primary ledger is Encumbrance Accrual Method"

I found that encumbrance journals was transferred to this ledger but I want to transfer actual journals only.

So Why encumbrance journals transferred to this secondary ledger?

And How to prevent transfer or map this journals to it?

thanks