Replacing YCOA Chart of Account with customer's operating COA

Hello,

We’ve installed the Group Reporting Best Practice content XX_1SG_OP in our On-Premise 1909 test environment. During the installation, we were prompted to create the YCOA G/L Chart of Account in OB13.

Now I’m trying to test grp. reporting but I would like to replace YCOA with our existing operating Chart of Acct, since YCOA was only a shell with no GL accounts and therefore no data. I tried to do it using the Assign FS Item Mappings app, but YCOA was the only G/L COA available for selection, so I'm unable to replace it in this app.

Is there a way for me to replace YCOA so that another COA can be linked to the Consolidation Chart of account Y1?

My objective is to test the data-flow from ACOCA to ACDOCU and subsequent consolidation by leveraging as much as the SAP-provided best-practice content as possible.

I appreciate your guidance in mapping our existing Chart of Acct to Y1..

Oma C