Mass Transfers for bulk of assets

Hi,

I have a scenario with around 500 Assets with same category and existing unique Dep Exp code combination for example as  (1-2-3)

In above 500 assets Need to change Dep exp Codes for 100 assets with Dep Exp code as (1-2-4)

For 200 assets as (1-2-5)

For 200 assets as (1-2-6)

Issue is that if I Insert the asset category and “Transfer From” Exp Account ((1-2-3))and “Transfer to” as (1-2-4) it will replace all 500 assets with code (1-2-4)

How to get this sorted?

Rgds

Raju