How to reverse Credit Memo invoice with Landed Cost

Dear Experts,

Kindly advise what is the correct step to reverse AP Invoice when it tied with Landed cost(from GRPO)

Below is my scenario:

1) Create GRPO

2) Create Landed Cost based on GRPO in 1)

3) Send GRPO to AP invoice

4) AP Invoice need to reverse by using AP Credit Memo.

My inquiries:

What is the correct way to reverse the cost in GRPO and the landed cost upon the AP Credit Memo?

Notice that, when copy directly AP Invoice in credit memo,

- Journal entry in APCN will only reverse the GRPO cost

- But in inventory audit report, we can see that cost in same APCN will included together with landed cost.