How does SLA creat accounting for rollback asset depreciation

Oracle R12.1.3 FA module

How does SLA work while creating account for rollback depreciation.

I updated the SLA journal lines defination (Event Class: Depreciation, Event Type: All) , then re-run the depreciation.

I found that the journal entry of depreciation rollback is not affected, but the new depreciation is.

steps:

1. Asset depreciation without closing period

2. Creating account (final)

    a. Depreciation

     Dr:A

      Cr:B

3. modify SLA journal line defination (add special segment derivation rull to Acc segment for line type: Periodic Depreciation Reserve)

4. re-run asset depreciation without closing period

5. Create accounting (final)

    a. Rollback

        Dr:B (Original)

          Cr:A

    b. Depreciation