Correcting Assignment Distribution of existing asset in FA

Hi everyone,

I am getting a little confused on how I can go about this. I want to change the distribution of exisiting accounts in FA. The expense account and location are the same. The total number of units still remain to be 1. Below is what I am trying to do:

Current Setup:

Asset #1 - Units = .08 (Expense account1 - Location1)

Asset #2 - Units = .02 (Expense Account2 - Location2)

Total Units = 1

Change to:

Asset #1 - Units = .04 (Expense account1 - Location1)

Asset #2 - Units = .06 (Expense account1 - Location1)

When I try to change this in the assignments window, I get the message - APP-OFA-48313: you cannot create identical distribution lines.